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Protein

3-methyl-2-oxobutanoate hydroxymethyltransferase

Gene

panB

Organism
Pectobacterium atrosepticum (strain SCRI 1043 / ATCC BAA-672) (Erwinia carotovora subsp. atroseptica)
Status
Reviewed-Annotation score: -Protein inferred from homologyi

Functioni

Catalyzes the reversible reaction in which hydroxymethyl group from 5,10-methylenetetrahydrofolate is transferred onto alpha-ketoisovalerate to form ketopantoate.UniRule annotation

Catalytic activityi

5,10-methylenetetrahydrofolate + 3-methyl-2-oxobutanoate + H2O = tetrahydrofolate + 2-dehydropantoate.UniRule annotation

Cofactori

Mg2+UniRule annotationNote: Binds 1 Mg2+ ion per subunit.UniRule annotation

Pathwayi: (R)-pantothenate biosynthesis

This protein is involved in step 1 of the subpathway that synthesizes (R)-pantoate from 3-methyl-2-oxobutanoate.UniRule annotation
Proteins known to be involved in the 2 steps of the subpathway in this organism are:
  1. 3-methyl-2-oxobutanoate hydroxymethyltransferase (panB)
  2. 2-dehydropantoate 2-reductase (panE)
This subpathway is part of the pathway (R)-pantothenate biosynthesis, which is itself part of Cofactor biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes (R)-pantoate from 3-methyl-2-oxobutanoate, the pathway (R)-pantothenate biosynthesis and in Cofactor biosynthesis.

Sites

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Metal bindingi45MagnesiumUniRule annotation1
Metal bindingi84MagnesiumUniRule annotation1
Binding sitei84Alpha-ketoisovalerateUniRule annotation1
Binding sitei112Alpha-ketoisovalerateUniRule annotation1
Metal bindingi114MagnesiumUniRule annotation1
Active sitei181Proton acceptorUniRule annotation1

GO - Molecular functioni

GO - Biological processi

Keywordsi

Molecular functionTransferase
Biological processPantothenate biosynthesis
LigandMagnesium, Metal-binding

Enzyme and pathway databases

BioCyciPATR218491:G1G3T-3396-MONOMER
UniPathwayiUPA00028; UER00003

Names & Taxonomyi

Protein namesi
Recommended name:
3-methyl-2-oxobutanoate hydroxymethyltransferaseUniRule annotation (EC:2.1.2.11UniRule annotation)
Alternative name(s):
Ketopantoate hydroxymethyltransferaseUniRule annotation
Short name:
KPHMTUniRule annotation
Gene namesi
Name:panBUniRule annotation
Ordered Locus Names:ECA3321
OrganismiPectobacterium atrosepticum (strain SCRI 1043 / ATCC BAA-672) (Erwinia carotovora subsp. atroseptica)
Taxonomic identifieri218491 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaEnterobacteralesPectobacteriaceaePectobacterium
Proteomesi
  • UP000007966 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00001848451 – 2643-methyl-2-oxobutanoate hydroxymethyltransferaseAdd BLAST264

Interactioni

Subunit structurei

Homodecamer; pentamer of dimers.UniRule annotation

Protein-protein interaction databases

STRINGi218491.ECA3321

Structurei

3D structure databases

ProteinModelPortaliQ6D1X6
SMRiQ6D1X6
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Regioni45 – 46Alpha-ketoisovalerate bindingUniRule annotation2

Sequence similaritiesi

Belongs to the PanB family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105CCG Bacteria
COG0413 LUCA
HOGENOMiHOG000078427
KOiK00606
OMAiGHIGLMP
OrthoDBiPOG091H02K8

Family and domain databases

CDDicd06557 KPHMT-like, 1 hit
HAMAPiMF_00156 PanB, 1 hit
InterProiView protein in InterPro
IPR003700 Pantoate_hydroxy_MeTrfase
IPR015813 Pyrv/PenolPyrv_Kinase-like_dom
PANTHERiPTHR20881 PTHR20881, 1 hit
PfamiView protein in Pfam
PF02548 Pantoate_transf, 1 hit
PIRSFiPIRSF000388 Pantoate_hydroxy_MeTrfase, 1 hit
SUPFAMiSSF51621 SSF51621, 1 hit
TIGRFAMsiTIGR00222 panB, 1 hit

Sequencei

Sequence statusi: Complete.

Q6D1X6-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKPTTISHLR QWKQEQRKFA TITAYDASFS RLFFEQGIRV MLVGDSLGMT
60 70 80 90 100
VQGHDSTLPV TTHDIVYHTQ CVRRGAPLAL VLSDMPFMTY ATPEQTFSQA
110 120 130 140 150
AELMRAGANM VKLEGGSWLA PTVKMLTERA VPVCGHLGLT PQSVNIFGGY
160 170 180 190 200
KIQGRSESDA NQLLADALAL EEAGAQLLVL ECVPVALAKR VTEALSIPVI
210 220 230 240 250
GIGAGNVTDG QILVMHDALG ITGDSTPKFA KNFLAQSGDI RTAVRLYSQE
260
VEQGIYPAEE HSFH
Length:264
Mass (Da):28,643
Last modified:August 16, 2004 - v1
Checksum:i847D80E3831B230B
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
BX950851 Genomic DNA Translation: CAG76219.1
RefSeqiWP_011094836.1, NC_004547.2

Genome annotation databases

EnsemblBacteriaiCAG76219; CAG76219; ECA3321
KEGGieca:ECA3321
PATRICifig|218491.5.peg.3372

Similar proteinsi

Entry informationi

Entry nameiPANB_PECAS
AccessioniPrimary (citable) accession number: Q6D1X6
Entry historyiIntegrated into UniProtKB/Swiss-Prot: March 15, 2005
Last sequence update: August 16, 2004
Last modified: February 28, 2018
This is version 90 of the entry and version 1 of the sequence. See complete history.
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome
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Main funding by: National Institutes of Health