Reviewed, UniProtKB/Swiss-Prot Q4K5Y4 (PANB2_PSEF5)

Names and origin

Protein names

Recommended name:
    3-methyl-2-oxobutanoate hydroxymethyltransferase 2
    EC=2.1.2.11
Alternative name(s):
    Ketopantoate hydroxymethyltransferase 2
      Short name=KPHMT 2

Gene names

Name:	panB2
Ordered Locus Names:	PFL_5277

Organism

Pseudomonas fluorescens (strain Pf-5 / ATCC BAA-477) [Complete proteome] [HAMAP]

Taxonomic identifier

220664 [NCBI]

Taxonomic lineage

Bacteria › Proteobacteria › Gammaproteobacteria › Pseudomonadales › Pseudomonadaceae › Pseudomonas

Protein attributes

Sequence length	266 AA.
Sequence status	Complete.
Protein existence	Inferred from homology.

General annotation (Comments)

Function	Catalyzes the reversible reaction in which hydroxymethyl group from 5,10-methylenetetrahydrofolate is tranferred onto alpha-ketoisovalerate to form ketopantoate By similarity. HAMAP MF_00156
Catalytic activity	5,10-methylenetetrahydrofolate + 3-methyl-2-oxobutanoate + H2O = tetrahydrofolate + 2-dehydropantoate. HAMAP MF_00156
Cofactor	Binds 1 magnesium ion per subunit By similarity. HAMAP MF_00156
Pathway	Cofactor biosynthesis; (R)-pantothenate biosynthesis; (R)-pantoate from 3-methyl-2-oxobutanoate: step 1/2. HAMAP MF_00156
Subunit structure	Homodecamer; pentamer of dimers By similarity. HAMAP MF_00156
Subcellular location	Cytoplasm Potential HAMAP MF_00156.
Sequence similarities	Belongs to the panB family.

Ontologies

Keywords
Biological process	Pantothenate biosynthesis
Cellular component	Cytoplasm
Ligand	Magnesium Metal-binding
Molecular function	Methyltransferase Transferase
Technical term	Complete proteome
Gene Ontology (GO)
Biological process	pantothenate biosynthetic process Inferred from electronic annotation. Source: HAMAP
Cellular component	cytoplasm Inferred from electronic annotation. Source: UniProtKB-SubCell
Molecular function	3-methyl-2-oxobutanoate hydroxymethyltransferase activity Inferred from electronic annotation. Source: HAMAP magnesium ion binding Inferred from electronic annotation. Source: UniProtKB-KW
Complete GO annotation...

Sequence annotation (Features)

	Feature key	Position(s)	Length	Description	Graphical view	Feature identifier
Molecule processing
	Chain	1 – 266	266	3-methyl-2-oxobutanoate hydroxymethyltransferase 2 HAMAP MF_00156		PRO_0000297338
Regions
	Region	45 – 46	2	Alpha-ketoisovalerate binding By similarity
Sites
	Active site	181	1	Proton acceptor By similarity
	Metal binding	45	1	Magnesium By similarity
	Metal binding	84	1	Magnesium By similarity
	Metal binding	114	1	Magnesium By similarity
	Binding site	84	1	Alpha-ketoisovalerate By similarity
	Binding site	112	1	Alpha-ketoisovalerate By similarity

Sequences

	Sequence		Length	Mass (Da)
	Q4K5Y4-1 [UniParc]. Last modified August 2, 2005. Version 1. Checksum: AB8EC6AD814964C6	FASTA	266	27,966
	10 20 30 40 50 60 MPDITLTTLQ SLKQKGEKIT MLTCYDATFA HTCCEAGVEV LLVGDSLGMV LQGHDSTLPV 70 80 90 100 110 120 STADMAYHVA AVKRGNNGAL ILADLPFMSY ATTEQALSSS AQLMQAGAHM LKIEGAAWLA 130 140 150 160 170 180 EPVRLLNERG VPVCVHMGLT PQTVNVLGGY KVQGRNESQA RQMRADAIAL EQAGAAMLLL 190 200 210 220 230 240 ECVPSELAAE ITQAVKIPVI GIGAGNATDG QVLVLHDMLG LSLSGRSPKF VKNFMAGKDS 250 260 IQAALSAYVE EVKAVTFPGA EHGFSA

References

[1]

"Complete genome sequence of the plant commensal Pseudomonas fluorescens Pf-5." Paulsen I.T., Press C.M., Ravel J., Kobayashi D.Y., Myers G.S.A., Mavrodi D.V., DeBoy R.T., Seshadri R., Ren Q., Madupu R., Dodson R.J., Durkin A.S., Brinkac L.M., Daugherty S.C., Sullivan S.A., Rosovitz M.J., Gwinn M.L., Zhou L. , Schneider D.J., Cartinhour S.W., Nelson W.C., Weidman J., Watkins K., Tran K., Khouri H., Pierson E.A., Pierson L.S. III, Thomashow L.S., Loper J.E. Nat. Biotechnol. 23:873-878(2005) [PubMed: 15980861] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].

Cross-references

Sequence databases
EMBL GenBank DDBJ	CP000076 Genomic DNA. Translation: AAY94491.1.
RefSeq	YP_262349.1.
3D structure databases
HSSP	HSSP built from PDB template 1M3U based on UniProtKB P31057.
SMR	Q4K5Y4. Positions 4-265.
ModBase	Search...
Protein-protein interaction databases
STRING	Q4K5Y4.
Genome annotation databases
GeneID	3479673.
GenomeReviews	Gene locus PFL_5277 in contig CP000076_GR.
KEGG	pfl:PFL_5277.
NMPDR	fig|220664.3.peg.679.
Organism-specific databases
CMR	Search...
Phylogenomic databases
eggNOG	COG0413.
HOGENOM	HBG299908.
OMA	YATPEQT.
PhylomeDB	Q4K5Y4.
Enzyme and pathway databases
BioCyc	PFLU220664:PFL_5277-MONOMER.
Family and domain databases
HAMAP	MF_00156. PanB. [Tree]
InterPro	IPR003700. Pantoate_hydroxy_MeTrfase. IPR015813. Pyrv/PenolPyrv_Kinase_cat. [Graphical view]
Gene3D	G3DSA:3.20.20.60. Pyrv/PenolPyrv_Kinase_cat. 1 hit.
PANTHER	PTHR20881. Pantoate_transf. 1 hit.
Pfam	PF02548. Pantoate_transf. 1 hit. [Graphical view]
PIRSF	PIRSF000388. Pantoate_hydroxy_MeTrfase. 1 hit.
TIGRFAMs	TIGR00222. panB. 1 hit.
ProtoNet	Search...

Entry information

Entry name

PANB2_PSEF5

Accession

Primary (citable) accession number: Q4K5Y4

Entry history

Integrated into UniProtKB/Swiss-Prot:	July 24, 2007
Last sequence update:	August 2, 2005
Last modified:	February 9, 2010
This is version 31 of the entry and version 1 of the sequence. [Complete history]

Entry status

Reviewed (UniProtKB/Swiss-Prot)

Annotation project

HAMAP (High-quality Automated and Manual Annotation of microbial Proteomes)