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1q5r

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Revision as of 08:10, 24 February 2018

The Rhodococcus 20S proteasome with unprocessed pro-peptides

Structural highlights

1q5r is a 14 chain structure with sequence from "mycobacterium_erythropolis"_gray_and_thornton_1928 "mycobacterium erythropolis" gray and thornton 1928. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1q5q
Gene:	PRCA(1) ("Mycobacterium erythropolis" Gray and Thornton 1928), PRCB(1) ("Mycobacterium erythropolis" Gray and Thornton 1928)
Activity:	Proteasome endopeptidase complex, with EC number 3.4.25.1
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PSA1_RHOER] Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation. The R.erythropolis proteasomes are able to cleave oligopeptides after Tyr, Phe and Leu, very poorly after Arg but not after Glu. Thus, displays chymotrypsin-like activity, low trypsin-like activity but no caspase-like activity.[HAMAP-Rule:MF_00289]^[1] ^[2] [PSB1_RHOER] Component of the proteasome core, a large protease complex with broad specificity involved in protein degradation. The R.erythropolis proteasomes are able to cleave oligopeptides after Tyr, Phe and Leu, very poorly after Arg but not after Glu. Thus, displays chymotrypsin-like activity, low trypsin-like activity but no caspase-like activity.[HAMAP-Rule:MF_02113]^[3] ^[4]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

To understand the role of the pro-peptide in proteasome assembly, we have determined structures of the Rhodococcus proteasome and a mutant form that prevents the autocatalytic removal of its pro-peptides. The structures reveal that the pro-peptide acts as an assembly-promoting factor by linking its own beta-subunit to two adjacent alpha-subunits, thereby providing a molecular explanation for the observed kinetics of proteasome assembly. The Rhodococcus proteasome has been found to have a substantially smaller contact region between alpha-subunits compared to those regions in the proteasomes of Thermoplasma, yeast, and mammalian cells, suggesting that a smaller contact area between alpha-subunits is likely the structural basis for the Rhodococcus alpha-subunits not assembling into alpha-rings when expressed alone. Analysis of all available beta-subunit structures shows that the contact area between beta-subunits within a beta-ring is not sufficient for beta-ring self-assembly without the additional contact provided by the alpha-ring. This appears to be a fail-safe mechanism ensuring that the active sites on the beta-subunits are activated only after proteasome assembly is complete.

Crystal structures of the Rhodococcus proteasome with and without its pro-peptides: implications for the role of the pro-peptide in proteasome assembly.,Kwon YD, Nagy I, Adams PD, Baumeister W, Jap BK J Mol Biol. 2004 Jan 2;335(1):233-45. PMID:14659753^[5]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Tamura T, Nagy I, Lupas A, Lottspeich F, Cejka Z, Schoofs G, Tanaka K, De Mot R, Baumeister W. The first characterization of a eubacterial proteasome: the 20S complex of Rhodococcus. Curr Biol. 1995 Jul 1;5(7):766-74. PMID:7583123
↑ Zuhl F, Tamura T, Dolenc I, Cejka Z, Nagy I, De Mot R, Baumeister W. Subunit topology of the Rhodococcus proteasome. FEBS Lett. 1997 Jan 2;400(1):83-90. PMID:9000518
↑ Tamura T, Nagy I, Lupas A, Lottspeich F, Cejka Z, Schoofs G, Tanaka K, De Mot R, Baumeister W. The first characterization of a eubacterial proteasome: the 20S complex of Rhodococcus. Curr Biol. 1995 Jul 1;5(7):766-74. PMID:7583123
↑ Zuhl F, Tamura T, Dolenc I, Cejka Z, Nagy I, De Mot R, Baumeister W. Subunit topology of the Rhodococcus proteasome. FEBS Lett. 1997 Jan 2;400(1):83-90. PMID:9000518
↑ Kwon YD, Nagy I, Adams PD, Baumeister W, Jap BK. Crystal structures of the Rhodococcus proteasome with and without its pro-peptides: implications for the role of the pro-peptide in proteasome assembly. J Mol Biol. 2004 Jan 2;335(1):233-45. PMID:14659753

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1q5r"

@@ Line 1: / Line 1: @@
 ==The Rhodococcus 20S proteasome with unprocessed pro-peptides==
 <StructureSection load='1q5r' size='340' side='right' caption='[[1q5r]], [[Resolution|resolution]] 3.10&Aring;' scene=''>
@@ Line 6: / Line 7: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">PRCA(1) ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1833 "Mycobacterium erythropolis" Gray and Thornton 1928]), PRCB(1) ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1833 "Mycobacterium erythropolis" Gray and Thornton 1928])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Proteasome_endopeptidase_complex Proteasome endopeptidase complex], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.4.25.1 3.4.25.1] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q5r OCA], [http://pdbe.org/1q5r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1q5r RCSB], [http://www.ebi.ac.uk/pdbsum/1q5r PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1q5r FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q5r OCA], [http://pdbe.org/1q5r PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1q5r RCSB], [http://www.ebi.ac.uk/pdbsum/1q5r PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1q5r ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 14: / Line 15: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/q5/1q5r_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/q5/1q5r_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 29: / Line 30: @@
 </div>
 <div class="pdbe-citations 1q5r" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Proteasome|Proteasome]]
 == References ==
 <references/>

1q5r

From Proteopedia

Revision as of 08:10, 24 February 2018

The Rhodococcus 20S proteasome with unprocessed pro-peptides

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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