In Streptomyces coelicolor SigR, methionine at the-35 element interacting region 4 confers the-31 '-adenine base selectivity
- Authors
- Kim, Keon Young; Park, Jeong Kuk; Park, SangYoun
- Issue Date
- 5-Feb-2016
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- ECF sigma factors; SigR (sigma(R)); Sigma factor region 4 (sigma(4)); Promoter-35 element; Streptomyces coelicolor
- Citation
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, v.470, no.2, pp.257 - 262
- Journal Title
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
- Volume
- 470
- Number
- 2
- Start Page
- 257
- End Page
- 262
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/7693
- DOI
- 10.1016/j.bbrc.2016.01.075
- ISSN
- 0006-291X
- Abstract
- In Gram-positive Streptomyces coelicolor A3(2), SigR (Sc sigma(R)) of the group IV ECF sigma factor singly activates expression of more than 30 oxidation responsive genes. Of the two promoter-binding domains individually called region 2 and region 4 - within Sc sigma(R) all, we hereby report a 2.6 angstrom resolution structure of the -35 element interacting carboxyl-terminal region 4 (Sc sigma(R)(4)). Structural comparison of Sc sigma(R)(4) with the Escherichia coli SigE (Ec sigma(E)) in complex with Ec sigma(E) -35 element suggested that a single residue (Sc sigma(R) Met188 and Ec sigma(E) Arg171) may be responsible for distinguishing the one-base pair difference of the -35 elements - Sc sigma(R) (-31')ATTCC(-35') ((-31')A) vs. Ec sigma(E-31')GTTCC-35' ((-31')G) - by interacting with the -31'-base Further studies using expressed Sc sigma(R) indicate that the wild-type Sc sigma(R) with Met188 selectively interacted with the (-31')A sequence over the (-31')G sequence, whereas a mutation of Met188 to arginine resulted in interaction with both (-31')A and (-31')G sequences. Hence, we conclude that Met188 of Sc sigma(R) confers the (-31')A-selectivity in -35 element interaction by disfavoured interaction with the (-31')G base. (C) 2016 Elsevier Inc. All rights reserved.
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Collections - College of Natural Sciences > School of Systems and Biomedical Science > 1. Journal Articles
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