1prv

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Template:STRUCTURE 1prv

Contents 1 PURINE REPRESSOR DNA-BINDING DOMAIN DNA BINDING 2 Function 3 About this Structure 4 See Also 5 Reference

PURINE REPRESSOR DNA-BINDING DOMAIN DNA BINDING

Template:ABSTRACT PUBMED 8591032

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]}

About this Structure

1prv is a 1 chain structure with sequence from Escherichia coli. Full experimental information is available from OCA.

See Also

• Purine repressor

Reference

• 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. ↑ 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
2. ↑ 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
3. ↑ 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
4. ↑ 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