ID A0A0A8EXP3_9ACTN Unreviewed; 312 AA.
AC A0A0A8EXP3;
DT 04-MAR-2015, integrated into UniProtKB/TrEMBL.
DT 04-MAR-2015, sequence version 1.
DT 24-JAN-2024, entry version 45.
DE RecName: Full=3-methyl-2-oxobutanoate hydroxymethyltransferase {ECO:0000256|HAMAP-Rule:MF_00156};
DE EC=2.1.2.11 {ECO:0000256|HAMAP-Rule:MF_00156};
DE AltName: Full=Ketopantoate hydroxymethyltransferase {ECO:0000256|HAMAP-Rule:MF_00156};
DE Short=KPHMT {ECO:0000256|HAMAP-Rule:MF_00156};
GN Name=panB {ECO:0000256|HAMAP-Rule:MF_00156};
GN ORFNames=GZL_06271 {ECO:0000313|EMBL:AJC58841.1};
OS Streptomyces sp. 769.
OC Bacteria; Actinomycetota; Actinomycetes; Kitasatosporales;
OC Streptomycetaceae; Streptomyces.
OX NCBI_TaxID=1262452 {ECO:0000313|EMBL:AJC58841.1, ECO:0000313|Proteomes:UP000031113};
RN [1] {ECO:0000313|EMBL:AJC58841.1, ECO:0000313|Proteomes:UP000031113}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=769 {ECO:0000313|EMBL:AJC58841.1,
RC ECO:0000313|Proteomes:UP000031113};
RA Du Q., Wang Q., Li Q., Wang L., Zhang Z., Ren J., Wang J., Wang M.;
RT "Complete Genome Sequence of Streptomyces gongzhulingensis.";
RL Submitted (DEC-2012) to the EMBL/GenBank/DDBJ databases.
CC -!- FUNCTION: Catalyzes the reversible reaction in which hydroxymethyl
CC group from 5,10-methylenetetrahydrofolate is transferred onto alpha-
CC ketoisovalerate to form ketopantoate. {ECO:0000256|HAMAP-
CC Rule:MF_00156}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=(6R)-5,10-methylene-5,6,7,8-tetrahydrofolate + 3-methyl-2-
CC oxobutanoate + H2O = (6S)-5,6,7,8-tetrahydrofolate + 2-
CC dehydropantoate; Xref=Rhea:RHEA:11824, ChEBI:CHEBI:11561,
CC ChEBI:CHEBI:11851, ChEBI:CHEBI:15377, ChEBI:CHEBI:15636,
CC ChEBI:CHEBI:57453; EC=2.1.2.11; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_00156};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|HAMAP-Rule:MF_00156,
CC ECO:0000256|PIRSR:PIRSR000388-3};
CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000256|HAMAP-Rule:MF_00156,
CC ECO:0000256|PIRSR:PIRSR000388-3};
CC -!- PATHWAY: Cofactor biosynthesis; (R)-pantothenate biosynthesis; (R)-
CC pantoate from 3-methyl-2-oxobutanoate: step 1/2. {ECO:0000256|HAMAP-
CC Rule:MF_00156}.
CC -!- SUBUNIT: Homodecamer; pentamer of dimers.
CC {ECO:0000256|ARBA:ARBA00011424, ECO:0000256|HAMAP-Rule:MF_00156}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00156}.
CC -!- SIMILARITY: Belongs to the PanB family. {ECO:0000256|ARBA:ARBA00008676,
CC ECO:0000256|HAMAP-Rule:MF_00156}.
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DR EMBL; CP003987; AJC58841.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A0A8EXP3; -.
DR KEGG; stre:GZL_06271; -.
DR HOGENOM; CLU_036645_1_0_11; -.
DR UniPathway; UPA00028; UER00003.
DR Proteomes; UP000031113; Chromosome.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0003864; F:3-methyl-2-oxobutanoate hydroxymethyltransferase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0008168; F:methyltransferase activity; IEA:UniProtKB-KW.
DR GO; GO:0032259; P:methylation; IEA:UniProtKB-KW.
DR GO; GO:0015940; P:pantothenate biosynthetic process; IEA:UniProtKB-UniRule.
DR CDD; cd06557; KPHMT-like; 1.
DR Gene3D; 3.20.20.60; Phosphoenolpyruvate-binding domains; 1.
DR HAMAP; MF_00156; PanB; 1.
DR InterPro; IPR003700; Pantoate_hydroxy_MeTrfase.
DR InterPro; IPR015813; Pyrv/PenolPyrv_Kinase-like_dom.
DR InterPro; IPR040442; Pyrv_Kinase-like_dom_sf.
DR NCBIfam; TIGR00222; panB; 1.
DR PANTHER; PTHR20881; 3-METHYL-2-OXOBUTANOATE HYDROXYMETHYLTRANSFERASE; 1.
DR PANTHER; PTHR20881:SF0; 3-METHYL-2-OXOBUTANOATE HYDROXYMETHYLTRANSFERASE; 1.
DR Pfam; PF02548; Pantoate_transf; 1.
DR PIRSF; PIRSF000388; Pantoate_hydroxy_MeTrfase; 1.
DR SUPFAM; SSF51621; Phosphoenolpyruvate/pyruvate domain; 1.
PE 3: Inferred from homology;
KW Cytoplasm {ECO:0000256|HAMAP-Rule:MF_00156};
KW Magnesium {ECO:0000256|HAMAP-Rule:MF_00156, ECO:0000256|PIRSR:PIRSR000388-
KW 3};
KW Metal-binding {ECO:0000256|HAMAP-Rule:MF_00156,
KW ECO:0000256|PIRSR:PIRSR000388-3};
KW Methyltransferase {ECO:0000313|EMBL:AJC58841.1};
KW Pantothenate biosynthesis {ECO:0000256|ARBA:ARBA00022655,
KW ECO:0000256|HAMAP-Rule:MF_00156};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_00156}.
FT REGION 1..45
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT ACT_SITE 229
FT /note="Proton acceptor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00156,
FT ECO:0000256|PIRSR:PIRSR000388-1"
FT BINDING 91..92
FT /ligand="3-methyl-2-oxobutanoate"
FT /ligand_id="ChEBI:CHEBI:11851"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00156,
FT ECO:0000256|PIRSR:PIRSR000388-2"
FT BINDING 91
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00156,
FT ECO:0000256|PIRSR:PIRSR000388-3"
FT BINDING 130
FT /ligand="3-methyl-2-oxobutanoate"
FT /ligand_id="ChEBI:CHEBI:11851"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00156,
FT ECO:0000256|PIRSR:PIRSR000388-2"
FT BINDING 130
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00156,
FT ECO:0000256|PIRSR:PIRSR000388-3"
FT BINDING 160
FT /ligand="3-methyl-2-oxobutanoate"
FT /ligand_id="ChEBI:CHEBI:11851"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00156,
FT ECO:0000256|PIRSR:PIRSR000388-2"
FT BINDING 162
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00156,
FT ECO:0000256|PIRSR:PIRSR000388-3"
SQ SEQUENCE 312 AA; 32740 MW; 8948BE3BCDEADC9E CRC64;
MLRDEETGAV TMTQLSPAQK PAAGATAEPT AKPVKDNPKS LYGGTSSRRI TVRDIAAAKE
RGEKWPMLTA YDAMTASVFD ESGIPVLLVG DSMGNCHLGY ESTVPVTLDE IAILSAAVVR
GTKRALVVAD LPFGSYQEGP VQALRSATRL VKEAGVSAVK LEGGERSAHQ VELLVSSGIP
VMAHVGLTPQ SVHAYGGYPV QGRGEEAAQQ LLRDAKAVQD AGAFAVVLEA VPAELAAEVT
RSLHIPTVGI GAGVECDAQV LVWTDMAGFT AGRVPRFVKQ YLQLRELLGG AARAFAEDVV
GGAFPAEEHT FH
//
