1b0n

From Proteopedia

(Difference between revisions)

Revision as of 16:09, 25 December 2014

SINR PROTEIN/SINI PROTEIN COMPLEX

Structural highlights

1b0n is a 2 chain structure with sequence from Bacillus subtilis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	SINR, SINI (Bacillus subtilis)
Resources:	FirstGlance, OCA, RCSB, PDBsum

Function

[SINR_BACSU] Negative as well as positive regulator of alternate developmental processes that are induced at the end of vegetative growth in response to nutrient depletion. Binds to the alkaline protease (aprE) gene at two sites. Also acts as a repressor of the key sporulation gene spo0A. Negatively regulates transcription of the eps operon, which is responsible for the biosynthesis of an exopolysaccharide involved in biofilm formation; therefore it could govern the transition between a state in which bacteria swim or swarm and a state in which bacteria assemble into multicellular communities. Acts with Hpr as a corepressor of epr expression. Also negatively regulates transcription of the lutABC operon, which is required for lactate utilization. Repressor activity is regulated by SinI.^[1] ^[2] ^[3] ^[4] [SINI_BACSU] Acts as an antagonist to SinR. SinI prevents SinR from binding to its target sequence on the gene for AprE.

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

Spore formation is an extreme response of some bacteria to adversity. In Bacillus subtilis the proteins of the sin, sporulation inhibition, region form a component of an elaborate molecular circuitry that regulates the commitment to sporulation. SinR is a tetrameric repressor protein that binds to the promoters of genes essential for entry into sporulation and prevents their transcription. This repression is overcome through the activity of SinI, which disrupts the SinR tetramer through the formation of a SinI-SinR heterodimer. The interactions governing this curious quaternary transition are revealed in the crystal structure of the SinI-SinR complex. The most striking, and unexpected, finding is that the tertiary structure of the DNA-binding domain of SinR is identical with that of the corresponding domains of the repressor proteins, CI and Cro, of bacteriophage 434 that regulate lysis/lysogeny. This structural similarity greatly exceeds that between SinR and any bacterial protein or between the 434 repressor proteins and their homologues in the closely related bacteriophage lambda. The close evolutionary relationship implied by the structures of SinR and the 434 repressors provokes both comparison of their functions and a speculative consideration of the intriguing possibility of an evolutionary link between the two adaptive responses, sporulation and prophage induction.

An evolutionary link between sporulation and prophage induction in the structure of a repressor:anti-repressor complex.,Lewis RJ, Brannigan JA, Offen WA, Smith I, Wilkinson AJ J Mol Biol. 1998 Nov 13;283(5):907-12. PMID:9799632^[5]

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

References

↑ Gaur NK, Oppenheim J, Smith I. The Bacillus subtilis sin gene, a regulator of alternate developmental processes, codes for a DNA-binding protein. J Bacteriol. 1991 Jan;173(2):678-86. PMID:1898931
↑ Mandic-Mulec I, Doukhan L, Smith I. The Bacillus subtilis SinR protein is a repressor of the key sporulation gene spo0A. J Bacteriol. 1995 Aug;177(16):4619-27. PMID:7642487
↑ Kearns DB, Chu F, Branda SS, Kolter R, Losick R. A master regulator for biofilm formation by Bacillus subtilis. Mol Microbiol. 2005 Feb;55(3):739-49. PMID:15661000 doi:10.1111/j.1365-2958.2004.04440.x
↑ Kodgire P, Dixit M, Rao KK. ScoC and SinR negatively regulate epr by corepression in Bacillus subtilis. J Bacteriol. 2006 Sep;188(17):6425-8. PMID:16923912 doi:10.1128/JB.00427-06
↑ Lewis RJ, Brannigan JA, Offen WA, Smith I, Wilkinson AJ. An evolutionary link between sporulation and prophage induction in the structure of a repressor:anti-repressor complex. J Mol Biol. 1998 Nov 13;283(5):907-12. PMID:9799632 doi:http://dx.doi.org/10.1006/jmbi.1998.2163

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/1b0n"

@@ Line 7: / Line 7: @@
 <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=1b0n FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1b0n OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1b0n RCSB], [http://www.ebi.ac.uk/pdbsum/1b0n PDBsum]</span></td></tr>
 </table>
+== Function ==
+[[http://www.uniprot.org/uniprot/SINR_BACSU SINR_BACSU]] Negative as well as positive regulator of alternate developmental processes that are induced at the end of vegetative growth in response to nutrient depletion. Binds to the alkaline protease (aprE) gene at two sites. Also acts as a repressor of the key sporulation gene spo0A. Negatively regulates transcription of the eps operon, which is responsible for the biosynthesis of an exopolysaccharide involved in biofilm formation; therefore it could govern the transition between a state in which bacteria swim or swarm and a state in which bacteria assemble into multicellular communities. Acts with Hpr as a corepressor of epr expression. Also negatively regulates transcription of the lutABC operon, which is required for lactate utilization. Repressor activity is regulated by SinI.<ref>PMID:1898931</ref> <ref>PMID:7642487</ref> <ref>PMID:15661000</ref> <ref>PMID:16923912</ref>  [[http://www.uniprot.org/uniprot/SINI_BACSU SINI_BACSU]] Acts as an antagonist to SinR. SinI prevents SinR from binding to its target sequence on the gene for AprE.
 == Evolutionary Conservation ==
 [[Image:Consurf_key_small.gif|200px|right]]

1b0n

From Proteopedia

Revision as of 16:09, 25 December 2014

SINR PROTEIN/SINI PROTEIN COMPLEX

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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