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MetJ DNA-binding transcriptional repressor

Synonyms: MetJ, MetJ-adenine, MetJ-MTA, MetJ-S-adenosylmethionine
Summary:
MetJ represses the expression of genes involved in biosynthesis and transport of methionine [6, 13]. MetJ belongs to the ribbon-helix-helix family of regulatory proteins. The typical motif of members of this family, the ribbon-helix-helix motif for DNA binding, has been observed in the crystalline structure of MetJ []. This motif is composed of a two-stranded antiparallel β-ribbon that lies along the DNA major groove, two outer α-helices that interact with adjacent proteins along the DNA, and two inner β-helices that form the subunit interface []. MetJ as a homodimer [5] recognizes and binds to an 8-bp DNA sequence called the met-box, which varies around a perfect palindromic consensus sequence [4]. MetJ finds its target sites rapidly by facilitated diffusion [].
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Transcription factor      
TF conformation(s):
Name Conformation Type TF-Effector Interaction Type Apo/Holo Conformation Evidence (Confirmed, Strong, Weak) References
MetJ Non-Functional   Apo [BPP], [IPI] [1]
MetJ-MTA Non-Functional   nd nd
MetJ-S-adenosylmethionine Functional Allosteric Holo [APPHINH], [BPP], [HIFS], [IPI] [1], [2], [3], [4], [5]
MetJ-adenine Non-Functional   nd nd
Evolutionary Family: MetJ
Sensing class: Using internal synthesized signals
Connectivity class: Local Regulator
Gene name: metJ
  Genome position: 4128078-4128395
  Length: 318 bp / 105 aa
Operon name: metJ
TU(s) encoding the TF:
Transcription unit        Promoter
metJ
metJp1
metJ
metJp2
metJ
metJp3


Regulon       
Regulated gene(s) ahpC, ahpF, folE, metA, metB, metC, metE, metF, metI, metK, metL, metN, metQ, metR, yeiB
Multifun term(s) of regulated gene(s) MultiFun Term (List of genes associated to the multifun term)
methionine (5)
detoxification (2)
folic acid (1)
amino acids (1)
threonine catabolism (1)
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Regulated operon(s) ahpCF, folE-yeiB, metA, metBL, metC, metE, metF, metK, metNIQ, metR
First gene in the operon(s) ahpC, folE, metA, metB, metC, metE, metF, metK, metN, metR, metR
Simple and complex regulons CRP,MetJ
HypT,MetJ
HypT,MetJ,PhoP
MetJ
MetJ,MetR
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Simple and complex regulatory phrases Regulatory phrase (List of promoters regulated by the phrase)
[MetJ-S-adenosylmethionine,-](11)


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
  MetJ-S-adenosylmethionine repressor ahpCp Sigma70 17.5 -7.5 ahpC, ahpF
catcgaaaacACGGAGGAAGTATAGAtgtccttgat
 638930 638945 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor ahpCp Sigma70 27.5 3.5 ahpC, ahpF
acggaggaagTATAGATGTCCTTGATtaacaccaaa
 638940 638955 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor folEp Sigma70 25.5 -171.5 folE, yeiB
tttcacttccGTATTTGCATAACGATgttttaacat
 2243816 2243831 [AIBSCS], [BPP], [CV(GEA)], [CV(GEA)], [GEA] [6]
  MetJ-S-adenosylmethionine repressor folEp Sigma70 33.5 -163.5 folE, yeiB
ccgtatttgcATAACGATGTTTTAACatctgctgat
 2243808 2243823 [AIBSCS], [BPP], [CV(GEA)], [CV(GEA)], [GEA] [6]
  MetJ-S-adenosylmethionine repressor folEp Sigma70 41.5 -155.5 folE, yeiB
gcataacgatGTTTTAACATCTGCTGatgaaaggca
 2243800 2243815 [AIBSCS], [BPP], [CV(GEA)], [CV(GEA)], [GEA] [6]
  MetJ-S-adenosylmethionine repressor folEp Sigma70 49.5 -147.5 folE, yeiB
atgttttaacATCTGCTGATGAAAGGcagcggcaat
 2243792 2243807 [AIBSCS], [BPP], [CV(GEA)], [CV(GEA)], [GEA] [6]
  MetJ-S-adenosylmethionine repressor metAp1 Sigma32 4.5 -43.5 metA
ggttatcttcAGCTATCTGGATGTCTaaacgtataa
 4214229 4214244 [AIBSCS], [BCE], [BPP], [CV(GEA)], [CV(GEA)], [GEA] [3], [6]
  MetJ-S-adenosylmethionine repressor metAp1 Sigma32 20.5 -27.5 metA
ctggatgtctAAACGTATAAGCGTATgtagtgaggt
 4214245 4214260 [AIBSCS], [BCE], [BPP], [CV(GEA)], [CV(GEA)], [GEA] [3], [6]
  MetJ-S-adenosylmethionine repressor metBp Sigma70 -56.5 -92.5 metB, metL
tcaatctataCGCAAAGAAGTTTAGAtgtccagatg
 4128572 4128587 [AIBSCS], [CV(GEA)], [GEA] [3], [6], [7]
  MetJ-S-adenosylmethionine repressor metBp Sigma70 -48.5 -84.5 metB, metL
tacgcaaagaAGTTTAGATGTCCAGAtgtattgacg
 4128580 4128595 [AIBSCS], [CV(GEA)], [GEA] [3], [6], [7]
  MetJ-S-adenosylmethionine repressor metBp Sigma70 -46.5 -82.5 metB, metL
cgcaaagaagTTTAGATGTCCAGATGtattgacgtc
 4128582 4128597 [AIBSCS], [CV(GEA)], [GEA] [3], [6], [7]
  MetJ-S-adenosylmethionine repressor metBp Sigma70 -40.5 -76.5 metB, metL
gaagtttagaTGTCCAGATGTATTGAcgtccattaa
 4128588 4128603 [AIBSCS], [CV(GEA)], [GEA] [3], [6], [7]
  MetJ-S-adenosylmethionine repressor metBp Sigma70 -38.5 -74.5 metB, metL
agtttagatgTCCAGATGTATTGACGtccattaaca
 4128590 4128605 [AIBSCS], [CV(GEA)], [GEA] [3], [6], [7]
  MetJ-S-adenosylmethionine repressor metBp Sigma70 -30.5 -66.5 metB, metL
tgtccagatgTATTGACGTCCATTAAcacaatgttt
 4128598 4128613 [AIBSCS], [CV(GEA)], [GEA] [3], [6], [7]
  MetJ-S-adenosylmethionine repressor metCp Sigma70 nd nd metC
nd
 nd nd [BPP] [8], [9]
  MetJ-S-adenosylmethionine repressor metEp nd 1.5 -168.5 metE
aaccgccaatTATGGATGTGTAAACAtctggacggc
 4012877 4012892 [BPP] [2]
  MetJ-S-adenosylmethionine repressor metEp nd 116.5 -53.5 metE
ggatgaataaACTTGCCGCCTTCCCTaaattcaaaa
 4012992 4013007 [BPP] [2]
  MetJ-S-adenosylmethionine repressor metFp Sigma70 -8.5 -78.5 metF
gcccttcggcTTTTCCTTCATCTTTAcatctggacg
 4132530 4132545 [BCE], [SM] [10]
  MetJ-S-adenosylmethionine repressor metFp Sigma70 2.0 -69.0 metF
cttttccttcATCTTTACATCTGGACgtctaaacgg
 4132539 4132554 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor metFp Sigma70 4.5 -66.5 metF
ttccttcatcTTTACATCTGGACGTCtaaacggata
 4132542 4132557 [BCE], [SM] [10]
  MetJ-S-adenosylmethionine repressor metFp Sigma70 7.5 -63.5 metF
cttcatctttACATCTGGACGTCTAAacggatagat
 4132545 4132560 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor metFp Sigma70 9.5 -61.5 metF
tcatctttacATCTGGACGTCTAAACggatagatgt
 4132547 4132562 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor metFp Sigma70 17.5 -53.5 metF
acatctggacGTCTAAACGGATAGATgtgcacaaca
 4132555 4132570 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor metFp Sigma70 20.5 -50.5 metF
tctggacgtcTAAACGGATAGATGTGcacaacacaa
 4132558 4132573 [BCE], [SM] [10]
  MetJ-S-adenosylmethionine repressor metKp Sigma38, Sigma70 -14.5 -143.5 metK
agaattgaccTAAAATAGCCATCCAGatgttaatcc
 3086555 3086570 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor metKp Sigma38, Sigma70 -2.5 -131.5 metK
aaatagccatCCAGATGTTAATCCATccataccgat
 3086567 3086582 [AIBSCS] [3]
  MetJ-S-adenosylmethionine repressor metNp Sigma70 -25.5 -94.5 metN, metI, metQ
aacctgattgATTTAGACGTCTGGATgccttaacat
 222732 222747 [AIBSCS], [APIORCISFBSCS] [3], [6], [11], [12]
  MetJ-S-adenosylmethionine repressor metNp Sigma70 -17.5 -86.5 metN, metI, metQ
tgatttagacGTCTGGATGCCTTAACatccatttca
 222724 222739 [AIBSCS], [CV(GEA)], [GEA] [3], [6], [11]
  MetJ-S-adenosylmethionine repressor metRp1 nd -144.5 -183.5 metR
ttttgaatttAGGGAAGGCGGCAAGTttattcatcc
 4012992 4013007 [BPP] [2]
  MetJ-S-adenosylmethionine repressor metRp1 nd -29.5 -68.5 metR
gccgtccagaTGTTTACACATCCATAattggcggtt
 4012877 4012892 [BPP] [2]
  MetJ-S-adenosylmethionine repressor metRp2 nd -162.5 -183.5 metR
ttttgaatttAGGGAAGGCGGCAAGTttattcatcc
 4012992 4013007 [BPP] [2]
  MetJ-S-adenosylmethionine repressor metRp2 nd -47.5 -68.5 metR
gccgtccagaTGTTTACACATCCATAattggcggtt
 4012877 4012892 [BPP] [2]


Alignment and PSSM for MetJ TFBSs    

Aligned TFBS of MetJ   
  Sequence
  GGACGTCAATACATCTGGA
  GGACGTCTAAACGGATAGA
  AGACGTCTGGATGCCTTAA
  GGACATCTAAACTTCTTTG
  AGACATCCAGATAGCTGAA
  AGATGTTAAAACATCGTTA
  AGACGTCCAGATGTAAAGA
  AGATGTTTACACATCCATA
  GGATGGATTAACATCTGGA
  GGACATCTATACTTCCTCC
  AGATGTAAAGATGAAGGAA
  AAACGTATAAGCGTATGTA
  GGATGGCTATTTTAGGTCA
  GGAAGGCGGCAAGTTTATT
  TTTCATCAGCAGATGTTAA

Position weight matrix (PWM). MetJ matrix-quality result    
A	7	1	14	1	4	0	3	4	11	5	13	1	6	2	4	1	4	4	12
C	0	0	0	9	0	0	10	2	0	3	0	8	0	1	8	2	0	2	1
G	7	13	0	0	11	3	0	1	3	4	1	1	6	2	2	3	5	4	1
T	1	1	1	5	0	12	2	8	1	3	1	5	3	10	1	9	6	5	1

Consensus    
;	consensus.strict             	gGACGtCtagAcgtctgga
;	consensus.strict.rc          	TCCAGACGTCTAGACGTCC
;	consensus.IUPAC              	rGAYGtCtarAyrtctkka
;	consensus.IUPAC.rc           	TMMAGAYRTYTAGACRTCY
;	consensus.regexp             	[ag]GA[CT]GtCta[ag]A[ct][ag]tct[gt][gt]a
;	consensus.regexp.rc          	T[AC][AC]AGA[CT][AG]T[CT]TAGAC[AG]TC[CT]

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    

 [BPP] Binding of purified proteins

 [IPI] Inferred from physical interaction

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

 [HIFS] Human inference of function from sequence

 [AIBSCS] Automated inference based on similarity to consensus sequences

 [CV(GEA)] cross validation(GEA)

 [GEA] Gene expression analysis

 [BCE] Binding of cellular extracts

 [SM] Site mutation

 [APIORCISFBSCS] A person inferred or reviewed a computer inference of sequence function based on similarity to a consensus sequence.


Reference(s)    

 [1] Saint-Girons I, Belfaiza J, Guillou Y, Perrin D, Guiso N, B?rzu O, Cohen GN., 1986, Interactions of the Escherichia coli methionine repressor with the metF operator and with its corepressor, S-adenosylmethionine., J Biol Chem.

 [2] Cai XY., Maxon ME., Redfield B., Glass R., Brot N., Weissbach H., 1989, Methionine synthesis in Escherichia coli: effect of the MetR protein on metE and metH expression., Proc Natl Acad Sci U S A 86(12):4407-11

 [3] Liu R., Blackwell TW., States DJ., 2001, Conformational model for binding site recognition by the E.coli MetJ transcription factor., Bioinformatics 17(7):622-33

 [4] Saint-Girons I., Duchange N., Cohen GN., Zakin MM., 1984, Structure and autoregulation of the metJ regulatory gene in Escherichia coli., J Biol Chem 259(22):14282-5

 [5] Smith AA., Greene RC., Kirby TW., Hindenach BR., 1985, Isolation and characterization of the product of the methionine-regulatory gene metJ of Escherichia coli K-12., Proc Natl Acad Sci U S A 82(18):6104-8

 [6] Marincs F., Manfield IW., Stead JA., McDowall KJ., Stockley PG., 2006, Transcript analysis reveals an extended regulon and the importance of protein-protein co-operativity for the Escherichia coli methionine repressor., Biochem J 396(2):227-34

 [7] Kirby TW., Hindenach BR., Greene RC., 1986, Regulation of in vivo transcription of the Escherichia coli K-12 metJBLF gene cluster., J Bacteriol 165(3):671-7

 [8] Otsuka J., Watanabe H., Mori KT., 1996, Evolution of transcriptional regulation system through promiscuous coupling of regulatory proteins with operons; suggestion from protein sequence similarities in Escherichia coli., J Theor Biol 178(2):183-204

 [9] Wild CM., McNally T., Phillips SE., Stockley PG., 1996, Effects of systematic variation of the minimal Escherichia coli met consensus operator site: in vivo and in vitro met repressor binding., Mol Microbiol 21(6):1125-35

 [10] Stauffer GV., Stauffer LT., 1988, Salmonella typhimurium LT2 metF operator mutations., Mol Gen Genet 214(1):32-6

 [11] Gal J., Szvetnik A., Schnell R., Kalman M., 2002, The metD D-methionine transporter locus of Escherichia coli is an ABC transporter gene cluster., J Bacteriol 184(17):4930-2

 [12] Merlin C., Gardiner G., Durand S., Masters M., 2002, The Escherichia coli metD locus encodes an ABC transporter which includes Abc (MetN), YaeE (MetI), and YaeC (MetQ)., J Bacteriol 184(19):5513-7

 [13] Weissbach H., Brot N., 1991, Regulation of methionine synthesis in Escherichia coli., Mol Microbiol 5(7):1593-7

 [14] Marti-Arbona R., Teshima M., Anderson PS., Nowak-Lovato KL., Hong-Geller E., Unkefer CJ., Unkefer PJ., 2012, Identification of new ligands for the methionine biosynthesis transcriptional regulator (MetJ) by FAC-MS., J Mol Microbiol Biotechnol 22(4);205-14


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