ID   A0A422QVY2_9RHOB        Unreviewed;       431 AA.
AC   A0A422QVY2;
DT   08-MAY-2019, integrated into UniProtKB/TrEMBL.
DT   08-MAY-2019, sequence version 1.
DT   14-DEC-2022, entry version 10.
DE   RecName: Full=Serine hydroxymethyltransferase {ECO:0000256|HAMAP-Rule:MF_00051};
DE            Short=SHMT {ECO:0000256|HAMAP-Rule:MF_00051};
DE            Short=Serine methylase {ECO:0000256|HAMAP-Rule:MF_00051};
DE            EC=2.1.2.1 {ECO:0000256|HAMAP-Rule:MF_00051};
GN   Name=glyA {ECO:0000256|HAMAP-Rule:MF_00051,
GN   ECO:0000313|EMBL:RNF34104.1};
GN   ORFNames=A7A09_011835 {ECO:0000313|EMBL:RNF34104.1};
OS   Methylarcula marina.
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodobacterales;
OC   Rhodobacteraceae; Methylarcula.
OX   NCBI_TaxID=72022 {ECO:0000313|EMBL:RNF34104.1, ECO:0000313|Proteomes:UP000238137};
RN   [1] {ECO:0000313|EMBL:RNF34104.1, ECO:0000313|Proteomes:UP000238137}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=VKM B-2159 {ECO:0000313|EMBL:RNF34104.1,
RC   ECO:0000313|Proteomes:UP000238137};
RA   Shmareva M.N., Doronina N.V., Vasilenko O.V., Tarlachkov S.V.,
RA   Trotsenko Y.A.;
RT   "Reclassification of Methylarcula marina and Methylarcula terricola as
RT   Paracoccus methylarcula sp.nov., comb.nov. and Paracoccus terricola
RT   comb.nov.";
RL   Submitted (MAY-2018) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the reversible interconversion of serine and
CC       glycine with tetrahydrofolate (THF) serving as the one-carbon carrier.
CC       This reaction serves as the major source of one-carbon groups required
CC       for the biosynthesis of purines, thymidylate, methionine, and other
CC       important biomolecules. Also exhibits THF-independent aldolase activity
CC       toward beta-hydroxyamino acids, producing glycine and aldehydes, via a
CC       retro-aldol mechanism. {ECO:0000256|HAMAP-Rule:MF_00051}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + glycine + H2O =
CC         (6S)-5,6,7,8-tetrahydrofolate + L-serine; Xref=Rhea:RHEA:15481,
CC         ChEBI:CHEBI:15377, ChEBI:CHEBI:15636, ChEBI:CHEBI:33384,
CC         ChEBI:CHEBI:57305, ChEBI:CHEBI:57453; EC=2.1.2.1;
CC         Evidence={ECO:0000256|HAMAP-Rule:MF_00051};
CC   -!- COFACTOR:
CC       Name=pyridoxal 5'-phosphate; Xref=ChEBI:CHEBI:597326;
CC         Evidence={ECO:0000256|ARBA:ARBA00001933,
CC         ECO:0000256|HAMAP-Rule:MF_00051, ECO:0000256|PIRSR:PIRSR000412-50};
CC   -!- PATHWAY: Amino-acid biosynthesis; glycine biosynthesis; glycine from L-
CC       serine: step 1/1. {ECO:0000256|HAMAP-Rule:MF_00051}.
CC   -!- PATHWAY: One-carbon metabolism; tetrahydrofolate interconversion.
CC       {ECO:0000256|HAMAP-Rule:MF_00051}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_00051}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00051}.
CC   -!- SIMILARITY: Belongs to the SHMT family. {ECO:0000256|ARBA:ARBA00006376,
CC       ECO:0000256|HAMAP-Rule:MF_00051}.
CC   -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC       feature annotation. {ECO:0000256|HAMAP-Rule:MF_00051}.
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:RNF34104.1}.
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DR   EMBL; PXNQ02000007; RNF34104.1; -; Genomic_DNA.
DR   AlphaFoldDB; A0A422QVY2; -.
DR   UniPathway; UPA00193; -.
DR   UniPathway; UPA00288; UER01023.
DR   Proteomes; UP000238137; Unassembled WGS sequence.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004372; F:glycine hydroxymethyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008168; F:methyltransferase activity; IEA:UniProtKB-KW.
DR   GO; GO:0030170; F:pyridoxal phosphate binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0019264; P:glycine biosynthetic process from serine; IEA:UniProtKB-UniRule.
DR   GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR   GO; GO:0035999; P:tetrahydrofolate interconversion; IEA:UniProtKB-UniPathway.
DR   CDD; cd00378; SHMT; 1.
DR   Gene3D; 3.40.640.10; -; 1.
DR   Gene3D; 3.90.1150.10; -; 1.
DR   HAMAP; MF_00051; SHMT; 1.
DR   InterPro; IPR015424; PyrdxlP-dep_Trfase.
DR   InterPro; IPR015421; PyrdxlP-dep_Trfase_major.
DR   InterPro; IPR015422; PyrdxlP-dep_Trfase_small.
DR   InterPro; IPR001085; Ser_HO-MeTrfase.
DR   InterPro; IPR019798; Ser_HO-MeTrfase_PLP_BS.
DR   InterPro; IPR039429; SHMT-like_dom.
DR   PANTHER; PTHR11680; SERINE HYDROXYMETHYLTRANSFERASE; 1.
DR   Pfam; PF00464; SHMT; 1.
DR   PIRSF; PIRSF000412; SHMT; 1.
DR   SUPFAM; SSF53383; PLP-dependent transferases; 1.
DR   PROSITE; PS00096; SHMT; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis {ECO:0000256|HAMAP-Rule:MF_00051};
KW   Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00051};
KW   Methyltransferase {ECO:0000313|EMBL:RNF34104.1};
KW   One-carbon metabolism {ECO:0000256|ARBA:ARBA00022563, ECO:0000256|HAMAP-
KW   Rule:MF_00051};
KW   Pyridoxal phosphate {ECO:0000256|ARBA:ARBA00022898, ECO:0000256|HAMAP-
KW   Rule:MF_00051};
KW   Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW   Rule:MF_00051}.
FT   DOMAIN          16..392
FT                   /note="SHMT"
FT                   /evidence="ECO:0000259|Pfam:PF00464"
FT   BINDING         128
FT                   /ligand="(6S)-5,6,7,8-tetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:57453"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00051"
FT   BINDING         132..134
FT                   /ligand="(6S)-5,6,7,8-tetrahydrofolate"
FT                   /ligand_id="ChEBI:CHEBI:57453"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00051"
FT   SITE            236
FT                   /note="Plays an important role in substrate specificity"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00051"
FT   MOD_RES         237
FT                   /note="N6-(pyridoxal phosphate)lysine"
FT                   /evidence="ECO:0000256|HAMAP-Rule:MF_00051,
FT                   ECO:0000256|PIRSR:PIRSR000412-50"
SQ   SEQUENCE   431 AA;  46099 MW;  6C464F96EC2A8555 CRC64;
     MNAPTRDDGF FTEALTSRDP EIAAAIGKEL GRQRDEIELI ASENIVSKAV LEAQGTVLTN
     KYAEGYPGKR YYGGCQYVDI VENLAIERAK ELFDCEFANV QPNSGSQMNQ AVFLALLKPG
     DTFMGLDLNS GGHLTHGSPV NMSGKWFNVL SYGVRQQDQL LDMEAIAEAA RQHKPKLILA
     GGTAYSRIWD WAAFRKIADE VGAYLMVDMA HIAGLVAGGQ HPSPLPHAHV VTTTTHKSLR
     GPRGGMVLTN DADIAKKINS AVFPGLQGGP LMHVIAAKAV AFGEALEPGF KDYAAQVVTN
     ARAMADELMK GGIDIVSGGT DNHLCLADLR PKGVTGKATE AALGRAHITC NKNGVPFDPE
     KPFVTSGIRL GAPAGTTRGF GEAEFRQIAR WIVEVVDGLA ANGEEGNSAT EDKVRAEVAE
     LCARFPLYPD L
//