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OxyR DNA-binding transcriptional dual regulator

Synonyms: OxyR
Summary:
OxyR, "oxidative stress regulator," is the transcriptional dual regulator for the expression of antioxidant genes in response to oxidative stress, in particular, elevated levels of hydrogen peroxide. The OxyR regulon includes genes involved in peroxide metabolism, redox balance, and peroxide protection by, for example, manganese uptake [21, 24] Moreover, OxyR activates the synthesis of the small, noncoding oxyS RNA. This allows OxyR to regulate as many as 40 additional gene products indirectly by affecting mRNA stability or translation efficiency [35] OxyR acts as a repressor for its own synthesis in both the oxidized and reduced forms [3, 6] In addition, expression of oxyR is positively regulated by cAMP-activated Crp protein during exponential growth and negatively regulated by RpoS when cells enter stationary phase [36] Based on microarray assays, a new function as regulator of S-nitrosylation (a nitrosative stress regulon) under anaerobic conditions has been determined for OxyR [4] and it is distinct from the OxyR regulon activated by oxidative stress [4] OxyR consists of 305 amino acid residues and is a member of the LysR family of bacterial transcription factors [3, 7] It is a tetramer in solution [] OxyR consists of two domains, the N-terminal domain, carrying a helix-turn-helix motif, and the C-terminal regulatory domain.
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Transcription factor      
TF conformation(s):
Name Conformation Type TF-Effector Interaction Type Apo/Holo Conformation Evidence (Confirmed, Strong, Weak) References
OxyR Functional   [APPHINH] [1], [2], [3], [4], [5], [6], [7], [8]
Evolutionary Family: LysR
Sensing class: Using internal synthesized signals
Connectivity class: Local Regulator
Gene name: oxyR
  Genome position: 4158490-4159407
  Length: 918 bp / 305 aa
Operon name: oxyR
TU(s) encoding the TF:
Transcription unit        Promoter
oxyR
oxyRp


Regulon       
Regulated gene(s) ahpC, ahpF, ccp, dps, dsbG, fhuF, flu, fur, gntP, gor, grxA, hcp, hcr, hemH, isrC, katG, mntH, nfsA, oxyR, oxyS, poxB, rimK, sufA, sufB, sufC, sufD, sufE, sufS, trxC, uof, uxuA, uxuB, ybjC, ybjN, ychF
Multifun term(s) of regulated gene(s) MultiFun Term (List of genes associated to the multifun term)
incorporation of metal ions (6)
sulfur metabolism (6)
detoxification (4)
membrane (3)
other (mechanical, nutritional, oxidative stress) (3)
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Regulated operon(s) ahpCF, ccp, dps, dsbG, fhuF, fldA-uof-fur, gntP, gor, grxA, hcp-hcr-poxB-ltaE-ybjT, hemH, isrC-flu, katG, mntH, oxyR, oxyS, pth-ychF, sufABCDSE, trxC, uxuAB, ybjC-nfsA-rimK-ybjN
First gene in the operon(s) ahpC, ahpC, ccp, dps, dsbG, fhuF, gntP, gor, grxA, hcp, hcp, hemH, isrC, katG, mntH, oxyR, oxyS, sufA, trxC, uof, uxuA, ybjC, ychF
Simple and complex regulons CRP,ExuR,OxyR,UxuR
CRP,OxyR
CRP,OxyR,UxuR
FNR,Fur,OxyR
FNR,NarL,NarP,NsrR,OxyR
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Simple and complex regulatory phrases Regulatory phrase (List of promoters regulated by the phrase)
[OxyR,+](13)
[OxyR,-](7)


Transcription factor regulation    


Transcription factor binding sites (TFBSs) arrangements
      

  Functional conformation Function Promoter Sigma factor Central Rel-Pos Distance to first Gene Genes Sequence LeftPos RightPos Evidence (Confirmed, Strong, Weak) References
  OxyR activator ahpCp Sigma70 -66.0 -90.0 ahpC, ahpF
ttatcaaatcGATAAGTTTTACCTTACaaccttcgta
638847 638863 [BPP], [GEA], [HIBSCS] [9], [10], [11], [12], [13]
  OxyR activator ahpCp Sigma70 -44.0 -68.0 ahpC, ahpF
cgattcggctAATGCGTTTCCATTATCaaatcgataa
638869 638885 [BPP], [GEA], [HIBSCS] [9], [10], [11], [12], [13], [14]
  OxyR activator ahpCp2 Sigma70 -76.0 -328.0 ahpC, ahpF
aaagtcgagtAAAAGGCATAACCTATCactgtcatag
638609 638625 [BPP], [GEA], [HIBSCS] [13]
  OxyR activator ahpCp2 Sigma70 -53.0 -305.0 ahpC, ahpF
tatcactgtcATAGGTAAGAGCTTAGAtcaggtgatt
638632 638648 [BPP], [GEA], [HIBSCS] [13]
  OxyR activator dpsp Sigma70, Sigma38 -66.0 -105.0 dps
ctatcacactAATAGTGGTAACAAGCGtgaaaaacaa
849008 849024 [HIBSCS] [15]
  OxyR activator dpsp Sigma70, Sigma38 -44.0 -83.0 dps
tgttccgctaTTCTGGCTGTTCCTATCacactaatag
848986 849002 [HIBSCS] [15]
  OxyR activator dsbGp nd -77.0 -304.0 dsbG
ttatcgatttGATAATGGAAACGCATTagccgaatcg
638869 638885 [BPP], [GEA], [HIBSCS] [10], [11], [12], [13], [14]
  OxyR activator dsbGp nd -55.0 -282.0 dsbG
tacgaaggttGTAAGGTAAAACTTATCgatttgataa
638847 638863 [BPP], [GEA], [HIBSCS] [10], [11], [12], [13]
  OxyR repressor fhuFp Sigma70 -105.0 -136.0 fhuF
ttatcaatgaAAGAGATGAAATCATGTtgcaacgtac
4605791 4605807 [BPP], [GEA], [HIBSCS] [13]
  OxyR repressor fhuFp Sigma70 -83.0 -114.0 fhuF
tatcatatgaTATTGGTTATCATTATCaatgaaagag
4605769 4605785 [BPP], [GEA], [HIBSCS] [13]
  OxyR repressor fhuFp Sigma70 -21.0 -52.0 fhuF
taatcatagcGATAGGTTTACCCGATAgcaagggatt
4605707 4605723 [BPP], [GEA], [HIBSCS] [13]
  OxyR repressor fhuFp Sigma70 2.0 -30.0 fhuF
taatctaaatGATAATGATTGCTAATCatagcgatag
4605685 4605701 [BPP], [GEA], [HIBSCS] [13]
  OxyR repressor flup Sigma70 2.0 1.0 isrC, flu
caataatagaATAAAACGATCAATATCtattttatcg
2071310 2071326 [BPP], [GEA], [HIBSCS], [SM] [16], [17], [18], [19], [20]
  OxyR repressor flup Sigma70 24.0 23.0 isrC, flu
atatctatttTATCGATCGTTTATATCgatcgataag
2071332 2071348 [BPP], [GEA], [HIBSCS], [SM] [16], [17], [18], [19], [20]
  OxyR repressor gntPp Sigma70 -152.0 -190.0 gntP
caatttcagaATTCGGGTTGACATGTCttaccaaaag
4551478 4551494 [GEA], [HIBSCS] [21]
  OxyR repressor gntPp Sigma70 -130.0 -168.0 gntP
aaattcttgtGATGTGGTTAACCAATTtcagaattcg
4551456 4551472 [GEA], [HIBSCS] [21]
  OxyR activator gorp Sigma70, Sigma38 nd -3646299.0 gor nd nd [GEA] [22]
  OxyR activator grxAp nd -66.0 -89.0 grxA
gtttaacagtTATAGCTTTTAGCAATTaatgcaacag
890834 890850 [BPP], [GEA], [HIBSCS] [21], [23]
  OxyR activator grxAp nd -44.0 -67.0 grxA
caattaatgcAACAGGTTAAACCTACTttcagcgaat
890812 890828 [BPP], [GEA], [HIBSCS] [21], [23]
  OxyR activator hcpp nd nd 913814.0 hcp, hcr, poxB nd nd [BPP], [GEA] [4]
  OxyR activator hemHp Sigma70 -55.0 -79.0 hemH
ctattcctttTTCTGATTTGACCTCTCacagcaatta
497968 497984 [BPP], [GEA] [21]
  OxyR activator hemHp Sigma70 -33.0 -57.0 hemH
ctctcacagcAATTAGTTCTTCTTCCTcacttttccg
497990 498006 [BPP], [GEA] [21]
  OxyR activator katGp Sigma70 -66.0 -89.0 katG
ccaacaatatGTAAGATCTCAACTATCgcatccgtgg
4133738 4133754 [BPP], [GEA], [HIBSCS] [10], [11], [12], [13], [14]
  OxyR activator katGp Sigma70 -44.0 -67.0 katG
ctatcgcatcCGTGGATTAATTCAATTataacttctc
4133760 4133776 [BPP], [GEA], [HIBSCS] [10], [11], [12], [13], [14]
  OxyR activator mntHp Sigma70, Sigma70 -76.0 -104.0 mntH
tgatttctctGATAGACCAGGATTATGactacgaaaa
2512802 2512818 [GEA], [HIBSCS], [SM] [24], [25]
  OxyR activator mntHp Sigma70, Sigma70 -54.0 -82.0 mntH
aattcatttaAATGGATTGTGGTGATTtctctgatag
2512780 2512796 [AIBSCS], [GEA], [SM] [24], [25]
  OxyR repressor oxyRp Sigma38, Sigma70 -18.0 -51.0 oxyR
cgataggtagAATAGCAATGAACGATTatccctatca
4158431 4158447 [BPP], [GEA], [HIBSCS] [3], [10], [12], [26]
  OxyR repressor oxyRp Sigma38, Sigma70 5.0 -29.0 oxyR
ccatcgccacGATAGTTCATGGCGATAggtagaatag
4158453 4158469 [BPP], [GEA], [HIBSCS] [3], [10], [12], [26]
  OxyR activator oxySp Sigma70 -67.0 -67.0 oxyS
ctattctaccTATCGCCATGAACTATCgtggcgatgg
4158453 4158469 [BPP], [GEA], [HIBSCS] [12], [26]
  OxyR activator oxySp Sigma70 -45.0 -45.0 oxyS
tgatagggatAATCGTTCATTGCTATTctacctatcg
4158431 4158447 [BPP], [GEA], [HIBSCS] [12], [26]
  OxyR activator sufAp Sigma70 -232.0 -264.0 sufA, sufB, sufC, sufD, sufS, sufE
ctatttaagaGATAGGTAAAAAAGTGCagcgttcaga
1764642 1764658 [BPP], [GEA] [21], [27], [28], [29], [30]
  OxyR activator sufAp Sigma70 -210.0 -242.0 sufA, sufB, sufC, sufD, sufS, sufE
gaaaaagttgTATTGAAAATGACTATTtaagagatag
1764620 1764636 [BPP], [GEA], [SM] [21], [27], [28], [29], [30]
  OxyR activator trxCp Sigma70 -57.0 -117.0 trxC
ccaaagcctgCGACTATCATACCTATTgaataaaaca
2718610 2718626 [BPP], [GEA], [HIBSCS] [31]
  OxyR activator trxCp Sigma70 -35.0 -95.0 trxC
ctattgaataAAACAGATTGTTGTCTGgaacaatgtc
2718632 2718648 [BPP], [GEA], [HIBSCS] [31]
  OxyR activator uofp nd -62.0 -166.0 uof, fur
caattattttGATTGGCATTATCTATTaatacggcgt
710883 710899 [BPP], [GEA], [HIBSCS] [32]
  OxyR activator uofp nd -40.0 -144.0 uof, fur
agcaaaagttACAAATTTGTAGCAATTattttgattg
710861 710877 [BPP], [GEA], [HIBSCS] [32]
  OxyR repressor uxuAp Sigma70 -54.0 -172.0 uxuA, uxuB
cgaattctgaAATTGGTTAACCACATCacaagaattt
4551456 4551472 [GEA], [HIBSCS] [21]
  OxyR repressor uxuAp Sigma70 -32.0 -150.0 uxuA, uxuB
cttttggtaaGACATGTCAACCCGAATtctgaaattg
4551478 4551494 [GEA], [HIBSCS] [21]
  OxyR repressor ybjCp Sigma70 -72.0 -93.0 ybjC, nfsA, rimK, ybjN
attcgctgaaAGTAGGTTTAACCTGTTgcattaattg
890812 890828 [BPP], [GEA], [HIBSCS] [21], [23]
  OxyR repressor ybjCp Sigma70 -50.0 -71.0 ybjC, nfsA, rimK, ybjN
ctgttgcattAATTGCTAAAAGCTATAactgttaaac
890834 890850 [BPP], [GEA], [HIBSCS] [21], [23]
  OxyR repressor ychFp Sigma70 9.5 -61.0 ychF
ctaacagattGCAGAAATGGAAATAACtttgcctatt
1257865 1257881 [BPP], [HIBSCS] [33]
  OxyR repressor ychFp Sigma70 31.5 -39.0 ychF
cttaataatcAACCTGTTATTGCTAACagattgcaga
1257843 1257859 [BPP], [HIBSCS] [33]
  OxyR activator yhjAp Sigma70 -86.0 -159.0 ccp
ctatcaataaGATAGCCTGTGCCTATTacccagatca
3669339 3669355 [AIBSCS], [BPP] [34]
  OxyR activator yhjAp Sigma70 -64.0 -137.0 ccp
caatcaattaCATGAATATAAACTATCaataagatag
3669317 3669333 [BPP], [HIBSCS] [34]


Alignment and PSSM for OxyR TFBSs    

Position weight matrix (PWM).   
A	9	13	6	12	6	12	11	13	23	12	2	5	27	0	0	17	11	12	7	11
C	4	6	1	6	7	4	1	4	4	13	25	1	3	0	15	0	15	3	5	11
G	1	6	23	14	3	0	5	5	4	4	0	5	4	0	1	9	1	1	10	0
T	20	9	4	2	18	18	17	12	3	5	7	23	0	34	18	8	7	18	12	12

PWM logo   


 


Evolutionary conservation of regulatory elements    
     Note: Evolutionary conservation of regulatory interactions and promoters is limited to gammaproteobacteria.
TF-target gene evolutionary conservation
Promoter-target gene evolutionary conservation


Evidence    

 [APPHINH] Assay of protein purified to homogeneity from its native host

 [BPP] Binding of purified proteins

 [GEA] Gene expression analysis

 [HIBSCS] Human inference based on similarity to consensus sequences

 [SM] Site mutation

 [AIBSCS] Automated inference based on similarity to consensus sequences



Reference(s)    

 [1] Blattner FR., Burland V., Plunkett G., Sofia HJ., Daniels DL., 1993, Analysis of the Escherichia coli genome. IV. DNA sequence of the region from 89.2 to 92.8 minutes., Nucleic Acids Res 21(23):5408-17

 [2] Bolker M., Kahmann R., 1989, The Escherichia coli regulatory protein OxyR discriminates between methylated and unmethylated states of the phage Mu mom promoter., EMBO J 8(8):2403-10

 [3] Christman MF., Storz G., Ames BN., 1989, OxyR, a positive regulator of hydrogen peroxide-inducible genes in Escherichia coli and Salmonella typhimurium, is homologous to a family of bacterial regulatory proteins., Proc Natl Acad Sci U S A 86(10):3484-8

 [4] Seth D., Hausladen A., Wang YJ., Stamler JS., 2012, Endogenous protein S-Nitrosylation in E. coli: regulation by OxyR., Science 336(6080):470-3

 [5] Tao K., Fujita N., Ishihama A., 1993, Involvement of the RNA polymerase alpha subunit C-terminal region in co-operative interaction and transcriptional activation with OxyR protein., Mol Microbiol 7(6):859-64

 [6] Tao K., Makino K., Yonei S., Nakata A., Shinagawa H., 1991, Purification and characterization of the Escherichia coli OxyR protein, the positive regulator for a hydrogen peroxide-inducible regulon., J Biochem (Tokyo) 109(2):262-6

 [7] Tao K., Makino K., Yonei S., Nakata A., Shinagawa H., 1989, Molecular cloning and nucleotide sequencing of oxyR, the positive regulatory gene of a regulon for an adaptive response to oxidative stress in Escherichia coli: homologies between OxyR protein and a family of bacterial activator proteins., Mol Gen Genet 218(3):371-6

 [8] Warne SR., Varley JM., Boulnois GJ., Norton MG., 1990, Identification and characterization of a gene that controls colony morphology and auto-aggregation in Escherichia coli K12., J Gen Microbiol 136 ( Pt 3):455-62

 [9] Campos E., Montella C., Garces F., Baldoma L., Aguilar J., Badia J., 2007, Aerobic L-ascorbate metabolism and associated oxidative stress in Escherichia coli., Microbiology 153(Pt 10):3399-408

 [10] Tartaglia LA., Gimeno CJ., Storz G., Ames BN., 1992, Multidegenerate DNA recognition by the OxyR transcriptional regulator., J Biol Chem 267(3):2038-45

 [11] Tartaglia LA., Storz G., Ames BN., 1989, Identification and molecular analysis of oxyR-regulated promoters important for the bacterial adaptation to oxidative stress., J Mol Biol 210(4):709-19

 [12] Toledano MB., Kullik I., Trinh F., Baird PT., Schneider TD., Storz G., 1994, Redox-dependent shift of OxyR-DNA contacts along an extended DNA-binding site: a mechanism for differential promoter selection., Cell 78(5):897-909

 [13] Zheng M., Wang X., Doan B., Lewis KA., Schneider TD., Storz G., 2001, Computation-directed identification of OxyR DNA binding sites in Escherichia coli., J Bacteriol 183(15):4571-9

 [14] Storz G., Tartaglia LA., Ames BN., 1990, Transcriptional regulator of oxidative stress-inducible genes: direct activation by oxidation., Science 248(4952):189-94

 [15] Altuvia S., Almiron M., Huisman G., Kolter R., Storz G., 1994, The dps promoter is activated by OxyR during growth and by IHF and sigma S in stationary phase., Mol Microbiol 13(2):265-72

 [16] Haagmans W., van der Woude M., 2000, Phase variation of Ag43 in Escherichia coli: Dam-dependent methylation abrogates OxyR binding and OxyR-mediated repression of transcription., Mol Microbiol 35(4):877-87

 [17] Henderson IR., Owen P., 1999, The major phase-variable outer membrane protein of Escherichia coli structurally resembles the immunoglobulin A1 protease class of exported protein and is regulated by a novel mechanism involving Dam and oxyR., J Bacteriol 181(7):2132-41

 [18] Waldron DE., Owen P., Dorman CJ., 2002, Competitive interaction of the OxyR DNA-binding protein and the Dam methylase at the antigen 43 gene regulatory region in Escherichia coli., Mol Microbiol 44(2):509-20

 [19] Wallecha A., Correnti J., Munster V., van der Woude M., 2003, Phase variation of Ag43 is independent of the oxidation state of OxyR., J Bacteriol 185(7):2203-9

 [20] Wallecha A., Munster V., Correnti J., Chan T., van der Woude M., 2002, Dam- and OxyR-dependent phase variation of agn43: essential elements and evidence for a new role of DNA methylation., J Bacteriol 184(12):3338-47

 [21] Zheng M., Wang X., Templeton LJ., Smulski DR., LaRossa RA., Storz G., 2001, DNA microarray-mediated transcriptional profiling of the Escherichia coli response to hydrogen peroxide., J Bacteriol 183(15):4562-70

 [22] Becker-Hapak M., Eisenstark A., 1995, Role of rpoS in the regulation of glutathione oxidoreductase (gor) in Escherichia coli., FEMS Microbiol Lett 134(1):39-44

 [23] Tao K., 1997, oxyR-dependent induction of Escherichia coli grx gene expression by peroxide stress., J Bacteriol 179(18):5967-70

 [24] Anjem A., Varghese S., Imlay JA., 2009, Manganese import is a key element of the OxyR response to hydrogen peroxide in Escherichia coli., Mol Microbiol 72(4):844-58

 [25] Kehres DG., Janakiraman A., Slauch JM., Maguire ME., 2002, Regulation of Salmonella enterica serovar Typhimurium mntH transcription by H(2)O(2), Fe(2+), and Mn(2+)., J Bacteriol 184(12):3151-8

 [26] Kullik I., Toledano MB., Tartaglia LA., Storz G., 1995, Mutational analysis of the redox-sensitive transcriptional regulator OxyR: regions important for oxidation and transcriptional activation., J Bacteriol 177(5):1275-84

 [27] Jang S., Imlay JA., 2010, Hydrogen peroxide inactivates the Escherichia coli Isc iron-sulphur assembly system, and OxyR induces the Suf system to compensate., Mol Microbiol 78(6):1448-67

 [28] Lee JH., Yeo WS., Roe JH., 2004, Induction of the sufA operon encoding Fe-S assembly proteins by superoxide generators and hydrogen peroxide: involvement of OxyR, IHF and an unidentified oxidant-responsive factor., Mol Microbiol 51(6):1745-55

 [29] Outten FW., Djaman O., Storz G., 2004, A suf operon requirement for Fe-S cluster assembly during iron starvation in Escherichia coli., Mol Microbiol 52(3):861-72

 [30] Yeo WS., Lee JH., Lee KC., Roe JH., 2006, IscR acts as an activator in response to oxidative stress for the suf operon encoding Fe-S assembly proteins., Mol Microbiol 61(1):206-18

 [31] Ritz D., Patel H., Doan B., Zheng M., Aslund F., Storz G., Beckwith J., 2000, Thioredoxin 2 is involved in the oxidative stress response in Escherichia coli., J Biol Chem 275(4):2505-12

 [32] Zheng M., Doan B., Schneider TD., Storz G., 1999, OxyR and SoxRS regulation of fur., J Bacteriol 181(15):4639-43

 [33] Wenk M., Ba Q., Erichsen V., Macinnes K., Wiese H., Warscheid B., Koch HG., 2012, A Universally Conserved ATPase Regulates the Oxidative Stress Response in Escherichia coli., J Biol Chem 287(52):43585-98

 [34] Partridge JD., Poole RK., Green J., 2007, The Escherichia coli yhjA gene, encoding a predicted cytochrome c peroxidase, is regulated by FNR and OxyR., Microbiology 153(Pt 5):1499-509

 [35] Altuvia S., Weinstein-Fischer D., Zhang A., Postow L., Storz G., 1997, A small, stable RNA induced by oxidative stress: role as a pleiotropic regulator and antimutator., Cell 90(1):43-53

 [36] Gonzalez-Flecha B., Demple B., 1997, Transcriptional regulation of the Escherichia coli oxyR gene as a function of cell growth., J Bacteriol 179(19):6181-6

 [37] Zheng M., Aslund F., Storz G., 1998, Activation of the OxyR transcription factor by reversible disulfide bond formation., Science 279(5357):1718-21



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