the-multibac-protein-complex-production-platform-at-the-embl

The MultiBac Protein Complex Production Platform at the EMBL

Proteomics  research revealed the impressive complexity of eukaryotic proteomes in  unprecedented detail. It is now a commonly accepted notion that ...

EMBL Grenoble Outstation and Unit of Virus Host Cell Interactions (UVHCI) UMR5322

The yeast protein Dom34 has been described to play a critical role in a newly identified mRNA decay pathway called No-Go decay. This pathway clears cells from mRNAs inducing translational stalls through endonucleolytic cleavage. Dom34 is related to the translation termination factor eRF1 and physically interacts with Hbs1, which is itself related to eRF3. We have solved the 2.5-A resolution crystal structure of Saccharomyces cerevisiae Dom34. This protein is organized in three domains with the central and C-terminal domains structurally homologous to those from eRF1. The N-terminal domain of Dom34 is different from eRF1. It adopts a Sm-fold that is often involved in the recognition of mRNA stem loops or in the recruitment of mRNA degradation machinery. The comparison of eRF1 and Dom34 domains proposed to interact directly with eRF3 and Hbs1, respectively, highlights striking structural similarities with eRF1 motifs identified to be crucial for the binding to eRF3. In addition, as observed for eRF1 that enhances eRF3 binding to GTP, the interaction of Dom34 with Hbs1 results in an increase in the affinity constant of Hbs1 for GTP but not GDP. Taken together, these results emphasize that eukaryotic cells have evolved two structurally related complexes able to interact with ribosomes either paused at a stop codon or stalled in translation by the presence of a stable stem loop and to trigger ribosome release by catalyzing chemical bond hydrolysis.

Structure of yeast Dom34: a protein related to translation termination factor Erf1 and involved in No-Go decay.

La prot&eacute;ine de levure Dom34 a &eacute;t&eacute; d&eacute;crit &agrave; jouer un r&ocirc;le crucial dans une voie de d&eacute;sint&eacute;gration ARNm nouvellement identifi&eacute;e appel&eacute;e carie interdite. Cette voie efface les cellules de l&#39;ARNm induisant des &eacute;tals translationnelles par clivage endonucl&eacute;olytique. Dom34 est li&eacute;e &agrave; la traduction r&eacute;siliation facteur eRF1 et interagit physiquement avec Hbs1, qui est lui-m&ecirc;me li&eacute; &agrave; l&#39;ERF-3. Nous avons r&eacute;solu la structure cristalline de 2,5-r&eacute;solution de Saccharomyces cerevisiae Dom34. Cette prot&eacute;ine est organis&eacute;e en trois domaines avec les domaines centraux et C-terminal structurellement homologues &agrave; celles d&#39;eRF1. Le domaine N-terminal de Dom34 diff&egrave;re d&#39;eRF1. Il adopte un Sm-pli qui est souvent impliqu&eacute; dans la reconnaissance des ARNm tige boucle ou dans le recrutement des m&eacute;canismes de d&eacute;gradation des ARNm. Comparer eRF1 et domaines Dom34 propos&eacute;s d&#39;interagir directement avec ERF-3 et Hbs1, respectivement, met en &eacute;vidence la substitution des similitudes structurelles avec des motifs eRF1 identifi&eacute;es comme &eacute;tant cruciale pour la liaison &agrave; ERF-3. En outre, tel qu&#39;observ&eacute; pour eRF1 qui am&eacute;liore l&#39;ERF-3 liaison au GTP, l&#39;interaction de Dom34 avec Hbs1 entra&icirc;ne une augmentation de la constante d&#39;affinit&eacute; de Hbs1 pour GTP mais pas de PIB. Pris ensemble, ces r&eacute;sultats mettent en &eacute;vidence que les cellules eucaryotes ont &eacute;volu&eacute; deux structurellement li&eacute;s complexes capables d&#39;interagir avec les ribosomes soit suspendue &agrave; un codon stop ou cal&eacute; en translation par la pr&eacute;sence d&#39;une boucle de souches stables et au ribosome d&eacute;clencheur en catalysant l&#39;hydrolyse de la liaison chimique.

Structure de levure Dom34 : une prot&eacute;ine relatives au coefficient de r&eacute;siliation traduction Erf1 et impliqu&eacute;s dans la d&eacute;sint&eacute;gration interdite.

La proteina di lievito Dom34 &egrave; stato descritto a giocare un ruolo critico in un percorso di decadimento mRNA recentemente identificata chiamato decadimento off limits. Questo pathway Cancella le cellule da mRNAs indurre translational bancarelle attraverso il clivaggio endonucleolytic. Dom34 &egrave; imparentato con la traduzione terminazione fattore eRF1 e fisicamente interagisce con Hbs1, che &egrave; imparentato con eRF3. Abbiamo risolto la struttura di cristallo 2,5-A risoluzione di Saccharomyces cerevisiae Dom34. Questa proteina &egrave; organizzata in tre domini con i domini centrali e C-terminale strutturalmente omologhi a quelli da eRF1. Il dominio N-terminale del Dom34 &egrave; diverso da eRF1. Esso adotta una Sm-piega che spesso &egrave; coinvolto nel riconoscimento del mRNA stem loops o l&#39;assunzione di macchinari di degradazione del mRNA. Il confronto tra eRF1 e Dom34 domini proposti per interagire direttamente con eRF3 e Hbs1, rispettivamente, mette in evidenza sorprendenti analogie strutturali con motivi eRF1 identificati per essere cruciale per l&#39;associazione a eRF3. Inoltre, come osservato per eRF1 che esalta eRF3 associazione di GTP, l&#39;interazione del Dom34 con Hbs1 risultati in un aumento della costante di affinit&agrave; del Hbs1 per GTP, ma non di PIL. Presi insieme, questi risultati sottolineano che le cellule eucariote sono evoluti due strutturalmente correlati complessi in grado di interagire con i ribosomi sia messo in pausa in un codone di stop o in fase di stallo nella traduzione dalla presenza di un ciclo di staminali stabile e a grilletto ribosoma rilascio di catalizzare l&#39;idrolisi del legame chimico.

Struttura del lievito Dom34: una proteina relative al fattore di terminazione traduzione Erf1 e coinvolte nel decadimento off limits.

Perdita di modificazione N7-methylguanosine (m7G) &egrave; coinvolto nella via di degradazione tRNA rapido recentemente scoperti. In lievito, questa modifica &egrave; catalizzata dal complesso heterodimeric composto da una subunit&agrave; catalitica Trm8 e una subunit&agrave; noncatalytic Trm82. Ci hanno risolto la struttura di cristallo di Trm8 da solo e nel complesso con Trm82. Trm8 subisce cambiamenti conformazionali sottili su Trm82 vincolante che spiega il requisito della Trm82 per attivit&agrave;. Cocrystallization con il donatore di metile di S-adenosil-metionina definisce il sito catalitico putativo e una tasca di legame della guanina. Dispersione dei raggi x small-angle in soluzione dell&#39;eterodimero Trm8-Trm82 in complesso con tRNA(Phe) ci ha permesso di proporre una struttura a bassa risoluzione del complesso ternario che definisce la modalit&agrave; di associazione tRNA di Trm8-Trm82 e gli elementi strutturali che contribuiscono alla specificit&agrave;.

La metilazione di m7G tRNA lievito complessa struttura.

Perte de modification de la N7-m&eacute;thylguanosine (m7G) est impliqu&eacute;e dans la voie de d&eacute;gradation rapide r&eacute;cemment d&eacute;couvert ARNt. Chez la levure, cette modification est catalys&eacute;e par l&#39;h&eacute;t&eacute;rodim&egrave;re complexe compos&eacute; d&#39;une sous-unit&eacute; catalytique Trm8 et une sous-unit&eacute; non-catalytique Trm82. Nous ont r&eacute;solu la structure cristalline du Trm8 seul et en complexe avec Trm8 Trm82. subit des changements conformationnels subtiles sur Trm82 contraignant qui explique l&#39;obligation de Trm82 pour l&#39;activit&eacute;. Cocristallisation avec le donneur de m&eacute;thyl S-ad&eacute;nosyl-m&eacute;thionine d&eacute;finit le site catalytique putatif et une poche de liaison de guanine. Diffusion des rayons x petit angle en solution de l&#39;h&eacute;t&eacute;rodim&egrave;re Trm8-Trm82 en complexe avec tRNA(Phe) nous a permis de proposer une structure basse r&eacute;solution du complexe ternaire qui d&eacute;finit le mode de liaison ARNt de Trm8-Trm82 et les &eacute;l&eacute;ments structurels qui contribuent &agrave; la sp&eacute;cificit&eacute;.

Structure de la m&eacute;thylation de m7G des tRNA de levure complexe.

Loss of N7-methylguanosine (m7G) modification is involved in the recently discovered rapid tRNA degradation pathway. In yeast, this modification is catalyzed by the heterodimeric complex composed of a catalytic subunit Trm8 and a noncatalytic subunit Trm82. We have solved the crystal structure of Trm8 alone and in complex with Trm82. Trm8 undergoes subtle conformational changes upon Trm82 binding which explains the requirement of Trm82 for activity. Cocrystallization with the S-adenosyl-methionine methyl donor defines the putative catalytic site and a guanine binding pocket. Small-angle X-ray scattering in solution of the Trm8-Trm82 heterodimer in complex with tRNA(Phe) has enabled us to propose a low-resolution structure of the ternary complex which defines the tRNA binding mode of Trm8-Trm82 and the structural elements contributing to specificity.

Structure of the yeast tRNA m7G methylation complex.

We are witnessing tremendous advances in our understanding of the organization of life. Complete genomes are being deciphered with ever increasing speed and accuracy, thereby setting the stage for addressing the entire gene product repertoire of cells, towards understanding whole biological systems. Advances in bioinformatics and mass spectrometric techniques have revealed the multitude of interactions present in the proteome. Multiprotein complexes are emerging as a paramount cornerstone of biological activity, as many proteins appear to participate, stably or transiently, in large multisubunit assemblies. Analysis of the architecture of these assemblies and their manifold interactions is imperative for understanding their function at the molecular level. Structural genomics efforts have fostered the development of many technologies towards achieving the throughput required for studying system-wide single proteins and small interaction motifs at high resolution. The present shift in focus towards large multiprotein complexes, in particular in eukaryotes, now calls for a likewise concerted effort to develop and provide new technologies that are urgently required to produce in quality and quantity the plethora of multiprotein assemblies that form the complexome, and to routinely study their structure and function at the molecular level. Current efforts towards this objective are summarized and reviewed in this contribution.

Getting a grip on complexes.

Nous assistons &agrave; des progr&egrave;s consid&eacute;rables r&eacute;alis&eacute;s dans la compr&eacute;hension de l&#39;organisation de la vie. G&eacute;nomes complets sont &ecirc;tre d&eacute;chiffr&eacute;s avec toujours plus de rapidit&eacute; et pr&eacute;cision, d&eacute;clenchant ainsi le terrain pour s&#39;attaquer au r&eacute;pertoire de produit de g&egrave;ne entier des cellules, vers la compr&eacute;hension des syst&egrave;mes biologiques enti&egrave;res. Progr&egrave;s de la bio-informatique et les techniques de spectrom&eacute;trie de masse ont mis en &eacute;vidence la multitude d&#39;interactions pr&eacute;sentes dans le prot&eacute;ome. Complexes multiprot&eacute;iques sont pr&eacute;sentent comme des pierres angulaires primordiale de l&#39;activit&eacute; biologique, comme de nombreuses prot&eacute;ines semblent participer, stablement ou transitoirement, aux grandes sous-unit&eacute;s assembl&eacute;es. Analyse de l&#39;architecture de ces assembl&eacute;es et leurs interactions multiples est imp&eacute;ratif pour comprendre leur fonction au niveau mol&eacute;culaire. Les efforts de g&eacute;nomique structurale ont favoris&eacute; le d&eacute;veloppement de nombreuses technologies pour atteindre le d&eacute;bit n&eacute;cessaire pour l&#39;&eacute;tude des prot&eacute;ines simples-l&#39;&eacute;chelle du syst&egrave;me et des motifs de petite interaction &agrave; haute r&eacute;solution. Le glissement actuel vers les grands complexes multiprot&eacute;iques, en particulier chez les eucaryotes, maintenant appelle &agrave; un effort concert&eacute; de m&ecirc;me de d&eacute;velopper et de fournir de nouvelles technologies qui sont requis de toute urgence pour produire en qualit&eacute; et en quantit&eacute; la pl&eacute;thore d&#39;assemblys multiprot&eacute;iques que forment le complexome et d&#39;&eacute;tudier syst&eacute;matiquement leur structure et leur fonction au niveau mol&eacute;culaire. Les efforts actuels vers cet objectif sont r&eacute;sum&eacute;s et examin&eacute;s dans cette contribution.

Obtenir une poign&eacute;e sur les complexes.

Stiamo assistendo a enormi progressi nella nostra comprensione dell&#39;organizzazione della vita. Genomi completi sono essere decifrati con sempre maggiore velocit&agrave; e precisione, quindi ponendo le basi per affrontare il repertorio di prodotto intero gene delle cellule, alla comprensione di sistemi biologici di tutto. Advances in bioinformatica e tecniche di spettrometrihe di massa hanno rivelato la moltitudine di interazioni presenti nel proteoma. Complessi multiproteici stanno emergendo come un pilastro fondamentale dell&#39;attivit&agrave; biologica, come molte proteine sembrano partecipare, stabile o transitoriamente, nelle grandi assemblee di questa malattia. Analisi dell&#39;architettura di queste assemblee e loro interazioni collettore sono indispensabile per capire la loro funzione a livello molecolare. Genomica strutturale sforzi hanno promosso lo sviluppo di molte tecnologie per raggiungere la velocit&agrave; necessaria per studiare le singole proteine system-wide e interazione piccoli motivi ad alta risoluzione. Il cambiamento presente nella messa a fuoco verso grandi complessi multiproteici, in particolare negli eucarioti, ora chiede uno sforzo concertato similarmente per sviluppare e fornire nuove tecnologie che sono urgentemente necessarie per produrre in qualit&agrave; e quantit&agrave; la pletora di assembly multiproteici che formano il complexome e a studiare sistematicamente la loro struttura e funzione a livello molecolare. Gli attuali sforzi verso questo obiettivo sono riassunti e rivisto in questo contributo.

Ottenere una presa su complessi.

Multiprotein complexes catalyze vital biological functions in the cell. A paramount objective of the SPINE2 project was to address the structural molecular biology of these multiprotein complexes, by enlisting and developing enabling technologies for their study. An emerging key prerequisite for studying complex biological specimens is their recombinant overproduction. Novel reagents and streamlined protocols for rapidly assembling co-expression constructs for this purpose have been designed and validated. The high-throughput pipeline implemented at IGBMC Strasbourg and the ACEMBL platform at the EMBL Grenoble utilize recombinant overexpression systems for heterologous expression of proteins and their complexes. Extension of the ACEMBL platform technology to include eukaryotic hosts such as insect and mammalian cells has been achieved. Efficient production of large multicomponent protein complexes for structural studies using the baculovirus/insect cell system can be hampered by a stoichiometric imbalance of the subunits produced. A polyprotein strategy has been developed to overcome this bottleneck and has been successfully implemented in our MultiBac baculovirus expression system for producing multiprotein complexes.

Robots, pipelines, polyproteins: enabling multiprotein expression in prokaryotic and eukaryotic cells.

Complexes multiprot&eacute;iques catalysent les fonctions biologiques vitales dans la cellule. Un objectif essentiel du projet SPINE2 est d&#39;aborder la biologie mol&eacute;culaire structurale de ces complexes multiprot&eacute;iques, en enr&ocirc;lant et le d&eacute;veloppement de technologies pour leur &eacute;tude habilitantes. Un pr&eacute;alable essentiel &eacute;mergente pour l&#39;&eacute;tude de sp&eacute;cimens biologiques complexes est leur surproduction recombinante. Nouveaux r&eacute;actifs et protocoles simplifi&eacute;es pour assembler rapidement des constructions de co-expression &agrave; cet effet ont &eacute;t&eacute; con&ccedil;us et valid&eacute;s. Le pipeline de haut d&eacute;bit mis en place &agrave; l&#39;IGBMC Strasbourg et la plate-forme d&#39;ACEMBL &agrave; l&#39;EMBL Grenoble utiliser les syst&egrave;mes de surexpression recombinant expression h&eacute;t&eacute;rologue de prot&eacute;ines et de leurs complexes. Extension de la technologie de plateforme ACEMBL pour inclure des h&ocirc;tes eucaryotes comme les insectes et les cellules de mammif&egrave;res ont &eacute;t&eacute; r&eacute;alis&eacute;e. Production efficace des complexes de grosse prot&eacute;ine &agrave; plusieurs composantes pour les &eacute;tudes structurales en utilisant le syst&egrave;me baculovirus/insecte cellule peut &ecirc;tre entrav&eacute;e par un d&eacute;s&eacute;quilibre stoechiom&eacute;trique des sous-unit&eacute;s produites. Une strat&eacute;gie de la polyprot&eacute;ine a &eacute;t&eacute; d&eacute;velopp&eacute;e pour surmonter ce goulot d&#39;&eacute;tranglement et a &eacute;t&eacute; mis en &oelig;uvre avec succ&egrave;s dans notre syst&egrave;me d&#39;expression baculovirus MultiBac pour produire des complexes multiprot&eacute;iques.

Robots, les pipelines, les polyprot&eacute;ines : activation multiprot&eacute;iques expression dans les cellules procaryotes et eucaryotes.

Complessi multiproteici catalizzano le funzioni biologiche vitali nella cella. Un obiettivo fondamentale del progetto SPINE2 &egrave; stato per affrontare la biologia molecolare strutturale di questi complessi multiproteici, l&#39;integrazione e lo sviluppo di tecnologie per il loro studio. Un prerequisito chiave emergente per lo studio di campioni biologici complessi &egrave; loro sovrapproduzione ricombinante. Romanzo reagenti e razionalizzati protocolli per assemblare rapidamente co-expression costrutti per questo scopo sono stati studiati e convalidati. La pipeline di alto-rendimento implementata IGBMC Strasburgo e della piattaforma ACEMBL presso l&#39;EMBL Grenoble utilizzano sistemi di sovraespressione ricombinante per l&#39;espressione eterologa delle proteine e dei loro complessi. Estensione della tecnologia piattaforma ACEMBL includere eucariotico host quali insetti e cellule di mammifero &egrave; stato raggiunto. Produzione efficiente di grandi proteine multicomponenti complessi per gli studi strutturali utilizzando il sistema baculovirus/insect cell pu&ograve; essere ostacolata da un squilibrio stechiometrico di subunit&agrave; prodotte. Una strategia polyprotein &egrave; stata sviluppata per superare questa impasse ed &egrave; stata implementata con successo nel nostro sistema di espressione di baculovirus MultiBac per la produzione di complessi multiproteici.

Robot, condutture, poliproteine: abilitazione multiproteici espressione in cellule di procariotiche ed eucarioti.

The initiation of gene transcription by RNA polymerase II is regulated by a plethora of proteins in human cells. The first general transcription factor to bind gene promoters is transcription factor IID (TFIID). TFIID triggers pre-initiation complex formation, functions as a coactivator by interacting with transcriptional activators and reads epigenetic marks. TFIID is a megadalton-sized multiprotein complex composed of TATA-box-binding protein (TBP) and 13 TBP-associated factors (TAFs). Despite its crucial role, the detailed architecture and assembly mechanism of TFIID remain elusive. Histone fold domains are prevalent in TAFs, and histone-like tetramer and octamer structures have been proposed in TFIID. A functional core-TFIID subcomplex was revealed in Drosophila nuclei, consisting of a subset of TAFs (TAF4, TAF5, TAF6, TAF9 and TAF12). These core subunits are thought to be present in two copies in holo-TFIID, in contrast to TBP and other TAFs that are present in a single copy, conveying a transition from symmetry to asymmetry in the TFIID assembly pathway. Here we present the structure of human core-TFIID determined by cryo-electron microscopy at 11.6â€‰Ã… resolution. Our structure reveals a two-fold symmetric, interlaced architecture, with pronounced protrusions, that accommodates all conserved structural features of the TAFs including the histone folds. We further demonstrate that binding of one TAF8-TAF10 complex breaks the original symmetry of core-TFIID. We propose that the resulting asymmetric structure serves as a functional scaffold to nucleate holo-TFIID assembly, by accreting one copy each of the remaining TAFs and TBP.

The architecture of human general transcription factor TFIID core complex.

L&#39;initiation de la transcription du g&egrave;ne de l&#39;ARN polym&eacute;rase II est r&eacute;gie par une multitude de prot&eacute;ines dans les cellules humaines. Le premier facteur de transcription g&eacute;n&eacute;rales pour lier les promoteurs de g&egrave;nes est le facteur de transcription IID (TFIID). TFIID d&eacute;clenche la formation de complexes paperasserie, fonctionne comme un co-activateur en interagissant avec les activateurs de la transcriptionnelles et lit les marques &eacute;pig&eacute;n&eacute;tiques. TFIID est qu&#39;un multiprotein m&eacute;gadaltons taille complexe compos&eacute; de TATA-bo&icirc;te-binding protein (TBP) et 13 facteurs associ&eacute;s &agrave; TBP (TAF). Malgr&eacute; son r&ocirc;le crucial, l&#39;architecture d&eacute;taill&eacute;e et le m&eacute;canisme de TFIID demeurent insaisissables. Histone pli domaines sont r&eacute;pandues dans les TAF, et structures t&eacute;tram&egrave;re et octam&egrave;re d&#39;histone semblables ont &eacute;t&eacute; propos&eacute;es dans TFIID. Un complexe fonctionnel noyau-TFIID a &eacute;t&eacute; r&eacute;v&eacute;l&eacute; dans les noyaux de drosophile, consistant en un sous-ensemble de TAF (TAF4, TAF5, TAF6, TAF9 et TAF12). Ces sous-unit&eacute;s de noyau sont cens&eacute;es &ecirc;tre pr&eacute;sents en deux exemplaires en holo-TFIID, contrairement &agrave; la PTB et autres TAF qui sont pr&eacute;sents en un seul exemplaire, en v&eacute;hiculant une transition entre la sym&eacute;trie et l&#39;asym&eacute;trie dans la voie d&#39;assemblage TFIID. Nous pr&eacute;sentons ici la structure de base-TFIID humaine d&eacute;termin&eacute;e par cryo microscopie &eacute;lectronique &agrave; 11.6 r&eacute;solution &Aring;. Notre structure r&eacute;v&egrave;le une double sym&eacute;trique, entrelac&eacute;e architecture, avec saillies prononc&eacute;es, qui tienne compte de toutes les caract&eacute;ristiques structurelles conserv&eacute;es des TAF, y compris les plis de l&#39;histone. Par ailleurs, nous d&eacute;montrent que la liaison d&#39;un complexe de TAF8-TAF10 rompt la sym&eacute;trie initiale de base-TFIID. Nous proposons que la structure asym&eacute;trique qui en r&eacute;sulte sert un &eacute;chafaudage fonctionnel &agrave; nucl&eacute;&eacute;e Assembl&eacute;e holo-TFIID, par accr&eacute;tion un copier chacun des TAF et PTB restants.

L&#39;architecture du complexe central pour transcription g&eacute;n&eacute;ral humain facteur TFIID.

L&#39;iniziazione della trascrizione del gene dalla RNA polimerasi II &egrave; regolata da una pletora di proteine in cellule umane. Il primo fattore di trascrizione generale per associare i promotori del gene &egrave; il fattore di trascrizione IID (TFIID). TFIID innesca la formazione di complessi pre-initiation, funziona come un coactivator interagendo con gli attivatori trascrizionali e legge marchi epigenetici. TFIID &egrave; che un complesso di multiprotein megadalton-dimensioni composto di TATA-box-binding protein (TBP) e 13 fattori associati TBP (TAF). Nonostante il suo ruolo cruciale, il meccanismo di montaggio di TFIID e dettagliata architettura resta sfuggente. Istone piega domini sono prevalenti in TAF e strutture tetramero e octamer istoni sono stati proposti nel TFIID. Un subcomplex funzionale core-TFIID &egrave; stato rivelato nei nuclei di drosofila, costituito da un sottoinsieme di TAFs (TAF4, TAF5, TAF6, TAF9 e TAF12). Queste subunit&agrave; nucleo si pensa siano presenti in due copie in holo-TFIID, contrariamente a TBP e altri TAF che sono presenti in una sola copia, trasportando una transizione dalla simmetria all&#39;asimmetria nella via dell&#39;Assemblea TFIID. Qui vi presentiamo la struttura del nucleo-TFIID umana determinata da crio-microscopia elettronica a 11,6 risoluzione &Aring;. La nostra struttura rivela una duplice simmetrica, interlacciata architettura, con marcate protrusioni, che ospita tutte le caratteristiche strutturali conservate di TAFs comprese le pieghe dell&#39;istone. Noi dimostrare ulteriormente che associazione di un complesso di TAF8-TAF10 rompe la simmetria originale del core-TFIID. Proponiamo che la struttura asimmetrica risultante funge da un&#39;impalcatura funzionale di nucleazione Assemblea holo-TFIID, di accrescimento di una copia ciascuno dei restanti TAFs e TBP.

Article	Year
Structure of yeast Dom34: a protein related to translation termination factor Erf1 and involved in No-Go decay. The Journal of biological chemistry\| PubMed ID: 18180287	2008
Structure of the yeast tRNA m7G methylation complex. Structure (London, England : 1993)\| PubMed ID: 18184583	2008
Getting a grip on complexes. Current genomics\| PubMed ID: 20514218	2009
Robots, pipelines, polyproteins: enabling multiprotein expression in prokaryotic and eukaryotic cells. Journal of structural biology\| PubMed ID: 21419851	2011
The architecture of human general transcription factor TFIID core complex. Nature\| PubMed ID: 23292512	2013

Maxime Chaillet

Biography

JoVE Journal Publications

Other Publications