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1pru

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Revision as of 10:06, 27 November 2019

PURINE REPRESSOR DNA-BINDING DOMAIN DNA BINDING

Structural highlights

1pru is a 1 chain structure with sequence from "bacillus_coli"_migula_1895 "bacillus coli" migula 1895. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	1prv
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[PURR_ECOLI] Is the main repressor of the genes involved in the de novo synthesis of purine nucleotides, regulating purB, purC, purEK, purF, purHD, purL, purMN and guaBA expression. In addition, it participates in the regulation or coregulation of genes involved in de novo pyrimidine nucleotide biosynthesis, salvage and uptake (pyrC, pyrD, carAB and codBA), and of several genes encoding enzymes necessary for nucleotide and polyamine biosynthesis (prsA, glyA, gcvTHP, speA, glnB). Binds to a 16-bp palindromic sequence located within the promoter region of pur regulon genes. The consensus binding sequence is 5'-ACGCAAACGTTTTCNT-3'. PurR is allosterically activated to bind its cognate DNA by binding the purine corepressors, hypoxanthine or guanine, thereby effecting transcription repression.^[1] ^[2] ^[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

BACKGROUND: The purine repressor (PurR) regulates genes that encode enzymes for purine biosynthesis. PurR has a two domain structure with an N-terminal DNA-binding domain (DBD) and a C-terminal corepressor-binding domain (CBD). The three dimensional structure of a ternary complex of PurR bound to both corepressor and a specific DNA sequence has recently been determined by X-ray crystallography. RESULTS: We have determined the solution structure of the PurR DBD by NMR. It contains three helices, with the first and second helices forming a helix-turn-helix motif. The tertiary structure of the three helices is very similar to that of the corresponding region in the ternary complex. The structure of the hinge helical region, however, which makes specific base contacts in the minor groove of DNA, is disordered in the DNA-free form. CONCLUSION: The stable formation of PurR hinge helices requires PurR dimerization, which brings the hinge regions proximal to each other. The dimerization of the hinge helices is likely to be controlled by the CBD dimerization interface, but is induced by specific-DNA binding.

Structural comparison of the free and DNA-bound forms of the purine repressor DNA-binding domain.,Nagadoi A, Morikawa S, Nakamura H, Enari M, Kobayashi K, Yamamoto H, Sampei G, Mizobuchi K, Schumacher MA, Brennan RG, et al. Structure. 1995 Nov 15;3(11):1217-24. PMID:8591032^[5]

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

References

↑ Meng LM, Kilstrup M, Nygaard P. Autoregulation of PurR repressor synthesis and involvement of purR in the regulation of purB, purC, purL, purMN and guaBA expression in Escherichia coli. Eur J Biochem. 1990 Jan 26;187(2):373-9. PMID:2404765
↑ Rolfes RJ, Zalkin H. Purification of the Escherichia coli purine regulon repressor and identification of corepressors. J Bacteriol. 1990 Oct;172(10):5637-42. PMID:2211500
↑ Choi KY, Zalkin H. Structural characterization and corepressor binding of the Escherichia coli purine repressor. J Bacteriol. 1992 Oct;174(19):6207-14. PMID:1400170
↑ Devroede N, Thia-Toong TL, Gigot D, Maes D, Charlier D. Purine and pyrimidine-specific repression of the Escherichia coli carAB operon are functionally and structurally coupled. J Mol Biol. 2004 Feb 6;336(1):25-42. PMID:14741201
↑ Nagadoi A, Morikawa S, Nakamura H, Enari M, Kobayashi K, Yamamoto H, Sampei G, Mizobuchi K, Schumacher MA, Brennan RG, et al.. Structural comparison of the free and DNA-bound forms of the purine repressor DNA-binding domain. Structure. 1995 Nov 15;3(11):1217-24. PMID:8591032

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/1pru"

@@ Line 1: / Line 1: @@
 ==PURINE REPRESSOR DNA-BINDING DOMAIN DNA BINDING==
-<StructureSection load='1pru' size='340' side='right' caption='[[1pru]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
+<StructureSection load='1pru' size='340' side='right'caption='[[1pru]], [[NMR_Ensembles_of_Models | 1 NMR models]]' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1pru]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1PRU OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1PRU FirstGlance]. <br>
@@ Line 28: / Line 28: @@
 </div>
 <div class="pdbe-citations 1pru" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Purine repressor|Purine repressor]]
 == References ==
 <references/>
@@ Line 33: / Line 36: @@
 </StructureSection>
 [[Category: Bacillus coli migula 1895]]
+[[Category: Large Structures]]
 [[Category: Brennan, R G]]
 [[Category: Enari, M]]

1pru

From Proteopedia

Revision as of 10:06, 27 November 2019

PURINE REPRESSOR DNA-BINDING DOMAIN DNA BINDING

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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