ID A0A1Y3XML6_9FIRM Unreviewed; 329 AA.
AC A0A1Y3XML6;
DT 30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT 30-AUG-2017, sequence version 1.
DT 24-JAN-2024, entry version 21.
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=B5G06_00085 {ECO:0000313|EMBL:OUN86411.1};
OS Flavonifractor sp. An52.
OC Bacteria; Bacillota; Clostridia; Eubacteriales; Oscillospiraceae;
OC Flavonifractor.
OX NCBI_TaxID=1965642 {ECO:0000313|EMBL:OUN86411.1, ECO:0000313|Proteomes:UP000195424};
RN [1] {ECO:0000313|Proteomes:UP000195424}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=An52 {ECO:0000313|Proteomes:UP000195424};
RA Medvecky M., Cejkova D., Polansky O., Karasova D., Kubasova T., Cizek A.,
RA Rychlik I.;
RT "Function of individual gut microbiota members based on whole genome
RT sequencing of pure cultures obtained from chicken caecum.";
RL Submitted (APR-2017) 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:OUN86411.1}.
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DR EMBL; NFIB01000001; OUN86411.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1Y3XML6; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000195424; Unassembled WGS sequence.
DR GO; GO:0046523; F:S-methyl-5-thioribose-1-phosphate isomerase activity; IEA:UniProtKB-UniRule.
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 Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_01678};
KW Methionine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01678};
KW Reference proteome {ECO:0000313|Proteomes:UP000195424}.
FT ACT_SITE 221
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 44..46
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 78
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 180
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 231..232
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT SITE 141
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
SQ SEQUENCE 329 AA; 35263 MW; 37AABFC1443450B0 CRC64;
MDAIRWEGNT LYLLDQTKLP VEETWLPYTD YRPVANAIRT MVVRGAPAIG VTAAYAYCLA
ALAGEDLAEA KAVLAASRPT AVNLFWALDR MARKAEACGG DPETLIAEAI AIHQEDVAMC
KAMGLYGASV VPDHAHILTH CNAGALATGG YGTALGVIRA AHEQGKVDMV YADETRPLLQ
GARLTAYELV TDHIPATLIA DNMAASLMAK GKIDMVVVGC DRMAANGDFA NKIGTYSVAV
NAHHHGVPFY VALPCSTIDL TIPDGDRIPI EERDKNEVRT LYGVQTAPAT VEVYNPAFDV
TPHSLVTGII TEKGVIYPPF KENLQKLFG
//
