ID H1G4C5_9GAMM Unreviewed; 351 AA.
AC H1G4C5;
DT 21-MAR-2012, integrated into UniProtKB/TrEMBL.
DT 21-MAR-2012, sequence version 1.
DT 24-JAN-2024, entry version 45.
DE RecName: Full=Methylthioribose-1-phosphate isomerase {ECO:0000256|HAMAP-Rule:MF_01678};
DE Short=M1Pi {ECO:0000256|HAMAP-Rule:MF_01678};
DE Short=MTR-1-P isomerase {ECO:0000256|HAMAP-Rule:MF_01678};
DE EC=5.3.1.23 {ECO:0000256|HAMAP-Rule:MF_01678};
DE AltName: Full=S-methyl-5-thioribose-1-phosphate isomerase {ECO:0000256|HAMAP-Rule:MF_01678};
GN Name=mtnA {ECO:0000256|HAMAP-Rule:MF_01678};
GN ORFNames=ECTPHS_08226 {ECO:0000313|EMBL:EHQ52662.1};
OS Ectothiorhodospira sp. PHS-1.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Chromatiales;
OC Ectothiorhodospiraceae; Ectothiorhodospira.
OX NCBI_TaxID=519989 {ECO:0000313|EMBL:EHQ52662.1, ECO:0000313|Proteomes:UP000005314};
RN [1] {ECO:0000313|EMBL:EHQ52662.1, ECO:0000313|Proteomes:UP000005314}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PHS-1 {ECO:0000313|EMBL:EHQ52662.1,
RC ECO:0000313|Proteomes:UP000005314};
RA Saltikov C.W., Zargar K., Conrad A., Bernick D., Lowe T.M., Stolc V.,
RA Hoeft S., Oremland R.S., Stolz J.;
RT "ArxA, a new clade of arsenite oxidase within the DMSO family of molybdenum
RT oxidoreductases.";
RL Submitted (JAN-2012) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the interconversion of methylthioribose-1-phosphate
CC (MTR-1-P) into methylthioribulose-1-phosphate (MTRu-1-P).
CC {ECO:0000256|HAMAP-Rule:MF_01678}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=S-methyl-5-thio-alpha-D-ribose 1-phosphate = S-methyl-5-thio-
CC D-ribulose 1-phosphate; Xref=Rhea:RHEA:19989, ChEBI:CHEBI:58533,
CC ChEBI:CHEBI:58548; EC=5.3.1.23; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_01678};
CC -!- PATHWAY: Amino-acid biosynthesis; L-methionine biosynthesis via salvage
CC pathway; L-methionine from S-methyl-5-thio-alpha-D-ribose 1-phosphate:
CC step 1/6. {ECO:0000256|HAMAP-Rule:MF_01678}.
CC -!- SIMILARITY: Belongs to the EIF-2B alpha/beta/delta subunits family.
CC MtnA subfamily. {ECO:0000256|HAMAP-Rule:MF_01678}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:EHQ52662.1}.
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DR EMBL; AGBG01000015; EHQ52662.1; -; Genomic_DNA.
DR RefSeq; WP_008932229.1; NZ_AGBG01000015.1.
DR AlphaFoldDB; H1G4C5; -.
DR STRING; 519989.ECTPHS_08226; -.
DR PATRIC; fig|519989.5.peg.1628; -.
DR eggNOG; COG0182; Bacteria.
DR OrthoDB; 9803436at2; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000005314; Unassembled WGS sequence.
DR GO; GO:0046523; F:S-methyl-5-thioribose-1-phosphate isomerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0003743; F:translation initiation factor activity; IEA:UniProtKB-KW.
DR GO; GO:0019509; P:L-methionine salvage from methylthioadenosine; IEA:UniProtKB-UniPathway.
DR GO; GO:0019284; P:L-methionine salvage from S-adenosylmethionine; IEA:UniProtKB-UniRule.
DR Gene3D; 1.20.120.420; translation initiation factor eif-2b, domain 1; 1.
DR HAMAP; MF_01678; Salvage_MtnA; 1.
DR InterPro; IPR000649; IF-2B-related.
DR InterPro; IPR005251; IF-M1Pi.
DR InterPro; IPR042529; IF_2B-like_C.
DR InterPro; IPR011559; Initiation_fac_2B_a/b/d.
DR InterPro; IPR027363; M1Pi_N.
DR InterPro; IPR037171; NagB/RpiA_transferase-like.
DR NCBIfam; TIGR00524; eIF-2B_rel; 1.
DR NCBIfam; TIGR00512; salvage_mtnA; 1.
DR PANTHER; PTHR43475; METHYLTHIORIBOSE-1-PHOSPHATE ISOMERASE; 1.
DR PANTHER; PTHR43475:SF1; METHYLTHIORIBOSE-1-PHOSPHATE ISOMERASE; 1.
DR Pfam; PF01008; IF-2B; 1.
DR SUPFAM; SSF100950; NagB/RpiA/CoA transferase-like; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|HAMAP-Rule:MF_01678};
KW Initiation factor {ECO:0000313|EMBL:EHQ52662.1};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_01678};
KW Methionine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01678};
KW Protein biosynthesis {ECO:0000313|EMBL:EHQ52662.1}.
FT ACT_SITE 241
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 52..54
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 95
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 200
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 251..252
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT SITE 161
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
SQ SEQUENCE 351 AA; 37739 MW; 03D7433951AF2ABA CRC64;
MNTHAHDSIR AVQWTGTHLR LLDQRRLPHE SVYLDMDTAP EAAVAIRDMV VRGAPAIGVT
AAYAVVLSAR QAWSRDPSHW RDAMQADLDT LAASRPTAVN LFWALAHMRR LMDRLPDGVD
PTGELLLEAE RIHHDDIEGN RRMGELGAAL IDPGRAVLTH CNTGSLATGG YGTALGVIRS
AYAKGLIPHV FADETRPWLQ GARLTAWELV QDGIPVSLLC EGAAASLMRE DRVSWVIVGA
DRIAANGDAA NKIGTYGLAV LARHHGVRFM VVAPTTTIDM EAADGSAIPI EQRGAEEVLE
LAGKRVAADG AGAWNPAFDV TPAGLIDAIV TERGVVEQPD REKMLALMSG R
//
