This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
1zo1
From Proteopedia
(Difference between revisions)
| (4 intermediate revisions not shown.) | |||
| Line 1: | Line 1: | ||
==IF2, IF1, and tRNA fitted to cryo-EM data OF E. COLI 70S initiation complex== | ==IF2, IF1, and tRNA fitted to cryo-EM data OF E. COLI 70S initiation complex== | ||
| - | < | + | <SX load='1zo1' size='340' side='right' viewer='molstar' caption='[[1zo1]], [[Resolution|resolution]] 13.80Å' scene=''> |
== Structural highlights == | == Structural highlights == | ||
| - | <table><tr><td colspan='2'>[[1zo1]] is a 3 chain structure with sequence from [ | + | <table><tr><td colspan='2'>[[1zo1]] is a 3 chain structure with sequence from [https://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ZO1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1ZO1 FirstGlance]. <br> |
| - | </td></tr><tr id=' | + | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">Electron Microscopy, [[Resolution|Resolution]] 13.8Å</td></tr> |
| - | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[ | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1zo1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1zo1 OCA], [https://pdbe.org/1zo1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1zo1 RCSB], [https://www.ebi.ac.uk/pdbsum/1zo1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1zo1 ProSAT]</span></td></tr> |
</table> | </table> | ||
== Function == | == Function == | ||
| - | [ | + | [https://www.uniprot.org/uniprot/IF2_ECOLI IF2_ECOLI] One of the essential components for the initiation of protein synthesis. Protects formylmethionyl-tRNA from spontaneous hydrolysis and promotes its binding to the 30S ribosomal subunits. Also involved in the hydrolysis of GTP during the formation of the 70S ribosomal complex.[HAMAP-Rule:MF_00100_B] |
== Evolutionary Conservation == | == Evolutionary Conservation == | ||
[[Image:Consurf_key_small.gif|200px|right]] | [[Image:Consurf_key_small.gif|200px|right]] | ||
| Line 19: | Line 19: | ||
</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1zo1 ConSurf]. | </jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/main_output.php?pdb_ID=1zo1 ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
| - | <div style="background-color:#fffaf0;"> | ||
| - | == Publication Abstract from PubMed == | ||
| - | The 70S ribosome and its complement of factors required for initiation of translation in E. coli were purified separately and reassembled in vitro with GDPNP, producing a stable initiation complex (IC) stalled after 70S assembly. We have obtained a cryo-EM reconstruction of the IC showing IF2*GDPNP at the intersubunit cleft of the 70S ribosome. IF2*GDPNP contacts the 30S and 50S subunits as well as fMet-tRNA(fMet). IF2 here adopts a conformation radically different from that seen in the recent crystal structure of IF2. The C-terminal domain of IF2 binds to the single-stranded portion of fMet-tRNA(fMet), thereby forcing the tRNA into a novel orientation at the P site. The GTP binding domain of IF2 binds to the GTPase-associated center of the 50S subunit in a manner similar to EF-G and EF-Tu. Additionally, we present evidence for the localization of IF1, IF3, one C-terminal domain of L7/L12, and the N-terminal domain of IF2 in the initiation complex. | ||
| - | + | ==See Also== | |
| - | + | *[[Transfer RNA (tRNA)|Transfer RNA (tRNA)]] | |
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
__TOC__ | __TOC__ | ||
| - | </ | + | </SX> |
[[Category: Escherichia coli]] | [[Category: Escherichia coli]] | ||
| - | [[Category: Allen | + | [[Category: Large Structures]] |
| - | [[Category: Ehrenberg | + | [[Category: Allen GS]] |
| - | [[Category: Frank | + | [[Category: Ehrenberg M]] |
| - | [[Category: Gursky | + | [[Category: Frank J]] |
| - | [[Category: Zavialov | + | [[Category: Gursky R]] |
| - | + | [[Category: Zavialov A]] | |
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
| - | + | ||
Current revision
IF2, IF1, and tRNA fitted to cryo-EM data OF E. COLI 70S initiation complex
| |||||||||
