PANB_AGRRK
ID PANB_AGRRK Reviewed; 273 AA.
AC B9JH27;
DT 28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT 24-MAR-2009, sequence version 1.
DT 03-AUG-2022, entry version 69.
DE RecName: Full=3-methyl-2-oxobutanoate hydroxymethyltransferase {ECO:0000255|HAMAP-Rule:MF_00156};
DE EC=2.1.2.11 {ECO:0000255|HAMAP-Rule:MF_00156};
DE AltName: Full=Ketopantoate hydroxymethyltransferase {ECO:0000255|HAMAP-Rule:MF_00156};
DE Short=KPHMT {ECO:0000255|HAMAP-Rule:MF_00156};
GN Name=panB {ECO:0000255|HAMAP-Rule:MF_00156}; OrderedLocusNames=Arad_2963;
OS Agrobacterium radiobacter (strain K84 / ATCC BAA-868).
OC Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC Rhizobiaceae; Rhizobium/Agrobacterium group; Agrobacterium;
OC Agrobacterium tumefaciens complex.
OX NCBI_TaxID=311403;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=K84 / ATCC BAA-868;
RX PubMed=19251847; DOI=10.1128/jb.01779-08;
RA Slater S.C., Goldman B.S., Goodner B., Setubal J.C., Farrand S.K.,
RA Nester E.W., Burr T.J., Banta L., Dickerman A.W., Paulsen I., Otten L.,
RA Suen G., Welch R., Almeida N.F., Arnold F., Burton O.T., Du Z., Ewing A.,
RA Godsy E., Heisel S., Houmiel K.L., Jhaveri J., Lu J., Miller N.M.,
RA Norton S., Chen Q., Phoolcharoen W., Ohlin V., Ondrusek D., Pride N.,
RA Stricklin S.L., Sun J., Wheeler C., Wilson L., Zhu H., Wood D.W.;
RT "Genome sequences of three Agrobacterium biovars help elucidate the
RT evolution of multichromosome genomes in bacteria.";
RL J. Bacteriol. 191:2501-2511(2009).
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:0000255|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:0000255|HAMAP-
CC Rule:MF_00156};
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00156};
CC Note=Binds 1 Mg(2+) ion per subunit. {ECO:0000255|HAMAP-Rule:MF_00156};
CC -!- PATHWAY: Cofactor biosynthesis; (R)-pantothenate biosynthesis; (R)-
CC pantoate from 3-methyl-2-oxobutanoate: step 1/2. {ECO:0000255|HAMAP-
CC Rule:MF_00156}.
CC -!- SUBUNIT: Homodecamer; pentamer of dimers. {ECO:0000255|HAMAP-
CC Rule:MF_00156}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00156}.
CC -!- SIMILARITY: Belongs to the PanB family. {ECO:0000255|HAMAP-
CC Rule:MF_00156}.
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DR EMBL; CP000628; ACM27024.1; -; Genomic_DNA.
DR RefSeq; WP_012651803.1; NC_011985.1.
DR AlphaFoldDB; B9JH27; -.
DR SMR; B9JH27; -.
DR STRING; 311403.Arad_2963; -.
DR EnsemblBacteria; ACM27024; ACM27024; Arad_2963.
DR KEGG; ara:Arad_2963; -.
DR eggNOG; COG0413; Bacteria.
DR HOGENOM; CLU_036645_1_0_5; -.
DR OMA; VLVWTDM; -.
DR OrthoDB; 916845at2; -.
DR UniPathway; UPA00028; UER00003.
DR Proteomes; UP000001600; Chromosome 1.
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:0015940; P:pantothenate biosynthetic process; IEA:UniProtKB-UniRule.
DR CDD; cd06557; KPHMT-like; 1.
DR Gene3D; 3.20.20.60; -; 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 PANTHER; PTHR20881; PTHR20881; 1.
DR Pfam; PF02548; Pantoate_transf; 1.
DR PIRSF; PIRSF000388; Pantoate_hydroxy_MeTrfase; 1.
DR SUPFAM; SSF51621; SSF51621; 1.
DR TIGRFAMs; TIGR00222; panB; 1.
PE 3: Inferred from homology;
KW Cytoplasm; Magnesium; Metal-binding; Pantothenate biosynthesis;
KW Reference proteome; Transferase.
FT CHAIN 1..273
FT /note="3-methyl-2-oxobutanoate hydroxymethyltransferase"
FT /id="PRO_1000123363"
FT ACT_SITE 187
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00156"
FT BINDING 49..50
FT /ligand="3-methyl-2-oxobutanoate"
FT /ligand_id="ChEBI:CHEBI:11851"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00156"
FT BINDING 49
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00156"
FT BINDING 88
FT /ligand="3-methyl-2-oxobutanoate"
FT /ligand_id="ChEBI:CHEBI:11851"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00156"
FT BINDING 88
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00156"
FT BINDING 118
FT /ligand="3-methyl-2-oxobutanoate"
FT /ligand_id="ChEBI:CHEBI:11851"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00156"
FT BINDING 120
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00156"
SQ SEQUENCE 273 AA; 29247 MW; CCB69781BDAE45EA CRC64;
MSATGLTRRN TTSQIEAMKG TRPIVSLTAY TTPIARLLDP HCDLLLVGDS LGMVLYGMES
TVGVTLEMMI AHGQGVMRGV QKACVIVDMP FGSYQESKEQ AFRNAVRILK ETGSDGVKLE
GGEEMAETVA FLTARGVPVF GHVGLMPQQV KTAGGYRALG RSEEEADKIR RDAKAIEQAG
AFALLVEGTV ETLAREITAS VGIPTIGIGA SPACDGQILV SDDMLGLFSD FKPRFVKHFA
QLAPTVSKAV EAYAEEVKAR TFPGPEHTFQ PKK
