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1tty

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Revision as of 11:59, 24 December 2020

Solution structure of sigma A region 4 from Thermotoga maritima

Structural highlights

1tty is a 1 chain structure with sequence from Atcc 43589. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Gene:	RPOD, SIGA, TM1451 (ATCC 43589)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[SIGA_THEMA] Sigma factors are initiation factors that promote the attachment of RNA polymerase to specific initiation sites and are then released. This sigma factor is the primary sigma factor during exponential growth.[HAMAP-Rule:MF_00963]

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

Bacteriophage T4 AsiA is a versatile transcription factor capable of inhibiting host gene expression as an 'anti-sigma' factor while simultaneously promoting gene-specific expression of T4 middle genes in conjunction with T4 MotA. To accomplish this task, AsiA engages conserved region 4 of Eschericia coli sigma70, blocking recognition of most host promoters by sequestering the DNA-binding surface at the AsiA/sigma70 interface. The three-dimensional structure of an AsiA/region 4 complex reveals that the C-terminal alpha helix of region 4 is unstructured, while four other helices adopt a completely different conformation relative to the canonical structure of unbound region 4. That AsiA induces, rather than merely stabilizes, this rearrangement can be realized by comparison to the homologous structures of region 4 solved in a variety of contexts, including the structure of Thermotoga maritima sigmaA region 4 described herein. AsiA simultaneously occupies the surface of region 4 that ordinarily contacts core RNA polymerase (RNAP), suggesting that an AsiA-bound sigma70 may also undergo conformational changes in the context of the RNAP holoenzyme.

T4 AsiA blocks DNA recognition by remodeling sigma70 region 4.,Lambert LJ, Wei Y, Schirf V, Demeler B, Werner MH EMBO J. 2004 Aug 4;23(15):2952-62. Epub 2004 Jul 15. PMID:15257291^[1]

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

References

↑ Lambert LJ, Wei Y, Schirf V, Demeler B, Werner MH. T4 AsiA blocks DNA recognition by remodeling sigma70 region 4. EMBO J. 2004 Aug 4;23(15):2952-62. Epub 2004 Jul 15. PMID:15257291 doi:10.1038/sj.emboj.7600312

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

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

@@ Line 1: / Line 1: @@
 ==Solution structure of sigma A region 4 from Thermotoga maritima==
-<StructureSection load='1tty' size='340' side='right' caption='[[1tty]], [[NMR_Ensembles_of_Models | 22 NMR models]]' scene=''>
+<StructureSection load='1tty' size='340' side='right'caption='[[1tty]], [[NMR_Ensembles_of_Models | 22 NMR models]]' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1tty]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43589 Atcc 43589]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TTY OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1TTY FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1tty]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_43589 Atcc 43589]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TTY OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1TTY FirstGlance]. <br>
 </td></tr><tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">RPOD, SIGA, TM1451 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=2336 ATCC 43589])</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=1tty FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tty OCA], [http://pdbe.org/1tty PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1tty RCSB], [http://www.ebi.ac.uk/pdbsum/1tty PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1tty ProSAT]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1tty FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tty OCA], [http://pdbe.org/1tty PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1tty RCSB], [http://www.ebi.ac.uk/pdbsum/1tty PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1tty ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 30: / Line 30: @@
 ==See Also==
-*[[Sigma factor|Sigma factor]]
+*[[Sigma factor 3D structures|Sigma factor 3D structures]]
 == References ==
 <references/>
@@ Line 36: / Line 36: @@
 </StructureSection>
 [[Category: Atcc 43589]]
+[[Category: Large Structures]]
 [[Category: Demeler, B]]
 [[Category: Lambert, L J]]

1tty

From Proteopedia

Revision as of 11:59, 24 December 2020

Solution structure of sigma A region 4 from Thermotoga maritima

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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