ID K0IHQ3_NITGG Unreviewed; 347 AA.
AC K0IHQ3;
DT 28-NOV-2012, integrated into UniProtKB/TrEMBL.
DT 28-NOV-2012, sequence version 1.
DT 27-MAR-2024, entry version 47.
DE RecName: Full=Putative 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=MTNA-like protein {ECO:0000256|HAMAP-Rule:MF_01678};
DE Short=aMTNA {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:0000313|EMBL:AFU59465.1};
GN OrderedLocusNames=Ngar_c25430 {ECO:0000313|EMBL:AFU59465.1};
OS Nitrososphaera gargensis (strain Ga9.2).
OC Archaea; Nitrososphaerota; Nitrososphaeria; Nitrososphaerales;
OC Nitrososphaeraceae; Nitrososphaera.
OX NCBI_TaxID=1237085 {ECO:0000313|EMBL:AFU59465.1, ECO:0000313|Proteomes:UP000008037};
RN [1] {ECO:0000313|EMBL:AFU59465.1, ECO:0000313|Proteomes:UP000008037}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Ga9.2 {ECO:0000313|Proteomes:UP000008037};
RX PubMed=23057602; DOI=10.1111/j.1462-2920.2012.02893.x;
RA Spang A., Poehlein A., Offre P., Zumbragel S., Haider S., Rychlik N.,
RA Nowka B., Schmeisser C., Lebedeva E.V., Rattei T., Bohm C., Schmid M.,
RA Galushko A., Hatzenpichler R., Weinmaier T., Daniel R., Schleper C.,
RA Spieck E., Streit W., Wagner M.;
RT "The genome of the ammonia-oxidizing Candidatus Nitrososphaera gargensis:
RT insights into metabolic versatility and environmental adaptations.";
RL Environ. Microbiol. 14:3122-45(2012).
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 -!- SIMILARITY: Belongs to the EIF-2B alpha/beta/delta subunits family.
CC MtnA subfamily. {ECO:0000256|HAMAP-Rule:MF_01678}.
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DR EMBL; CP002408; AFU59465.1; -; Genomic_DNA.
DR AlphaFoldDB; K0IHQ3; -.
DR STRING; 1237085.Ngar_c25430; -.
DR KEGG; nga:Ngar_c25430; -.
DR PATRIC; fig|1237085.11.peg.2520; -.
DR HOGENOM; CLU_016218_1_2_2; -.
DR InParanoid; K0IHQ3; -.
DR Proteomes; UP000008037; Chromosome.
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: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:AFU59465.1};
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:AFU59465.1};
KW Reference proteome {ECO:0000313|Proteomes:UP000008037}.
FT ACT_SITE 240
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 51..53
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 94
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 199
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 250..251
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT SITE 160
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
SQ SEQUENCE 347 AA; 37880 MW; 301D3C7A908B350D CRC64;
MPRNLDLLLT VAWENNSVVL IDQTKLPNKL VYVKCKDYRE VAEAIKKLVV RGAPAIGVTA
AFGLALAAQQ SKAKTLPELM TDLDTAFKVL RATRPTAVNL FWALERVMGR AKKAKTLQEA
KKAVFDEALK MSDEDINANR QMGANGAKLF RDGDIVLTHC NAGSLATVAY GTALGVIRAA
RESGKRLSVI ATETRPVMQG SRLTAFELQH DGIDVSLIPD TAVGHMMARG AIRRVIVGAD
RVLRTGHVFN KIGTYQVAIL ANKHKIPFYV AAPLSTFDFE SNPEDVVIEE RSVDEVVRVG
KKRVAPKGVR VFNPAFDMTP PELITGIITE RGVLTPPFEK NLKALLG
//
