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Protein

3-methyl-2-oxobutanoate hydroxymethyltransferase

Gene

panB

Organism
Azoarcus sp. (strain BH72)
Status
Reviewed-Annotation score: Annotation score: 3 out of 5-Protein inferred from homologyi

Functioni

Catalyzes the reversible reaction in which hydroxymethyl group from 5,10-methylenetetrahydrofolate is tranferred 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 (apbA1), 2-dehydropantoate 2-reductase (panE1)
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)LengthDescriptionGraphical viewFeature identifierActions
Metal bindingi51 – 511MagnesiumUniRule annotation
Metal bindingi90 – 901MagnesiumUniRule annotation
Binding sitei90 – 901Alpha-ketoisovalerateUniRule annotation
Binding sitei119 – 1191Alpha-ketoisovalerateUniRule annotation
Metal bindingi121 – 1211MagnesiumUniRule annotation
Active sitei188 – 1881Proton acceptorUniRule annotation

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Transferase

Keywords - Biological processi

Pantothenate biosynthesis

Keywords - Ligandi

Magnesium, Metal-binding

Enzyme and pathway databases

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:azo3144
OrganismiAzoarcus sp. (strain BH72)
Taxonomic identifieri62928 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaBetaproteobacteriaRhodocyclalesRhodocyclaceaeAzoarcus
Proteomesi
  • UP000002588 Componenti: Chromosome

Subcellular locationi

  • Cytoplasm UniRule annotation

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Cytoplasm

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 2712713-methyl-2-oxobutanoate hydroxymethyltransferasePRO_0000297218Add
BLAST

Interactioni

Subunit structurei

Homodecamer; pentamer of dimers.UniRule annotation

Protein-protein interaction databases

STRINGi62928.azo3144.

Structurei

3D structure databases

ProteinModelPortaliA1KAA5.
SMRiA1KAA5. Positions 10-271.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni51 – 522Alpha-ketoisovalerate bindingUniRule annotation

Sequence similaritiesi

Belongs to the PanB family.UniRule annotation

Phylogenomic databases

eggNOGiENOG4105CCG. Bacteria.
COG0413. LUCA.
HOGENOMiHOG000078427.
KOiK00606.
OMAiMAAGAQM.
OrthoDBiEOG63C0WN.

Family and domain databases

Gene3Di3.20.20.60. 1 hit.
HAMAPiMF_00156. PanB.
InterProiIPR003700. Pantoate_hydroxy_MeTrfase.
IPR015813. Pyrv/PenolPyrv_Kinase-like_dom.
[Graphical view]
PANTHERiPTHR20881. PTHR20881. 1 hit.
PfamiPF02548. Pantoate_transf. 1 hit.
[Graphical view]
PIRSFiPIRSF000388. Pantoate_hydroxy_MeTrfase. 1 hit.
SUPFAMiSSF51621. SSF51621. 1 hit.
TIGRFAMsiTIGR00222. panB. 1 hit.

Sequencei

Sequence statusi: Complete.

A1KAA5-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MSYLQDDKPV TLFELGKMRA EGRKIAMLTC YDASFAALLE RNGVDVLLVG
60 70 80 90 100
DSLGNVLQGQ KSTLPVTLEQ MAYHTECVVR GSSRPFVVTD MPFGSYQESP
110 120 130 140 150
EQAMRNAARL MAAGAEMVKL EGGAFMAETV RFLVERGVPV CAHIGLTPQS
160 170 180 190 200
VHQLGGYRVQ GRSEEGAARL KADALALEQA GAALVVLEMV PAAVASDITR
210 220 230 240 250
SLSTMATIGI GAGADCSGQV LVLHDMIGVY PGKKARFVKN FMEGAASIDA
260 270
AVAAYVAAVK DGSFPAAEHC Y
Length:271
Mass (Da):28,665
Last modified:February 6, 2007 - v1
Checksum:i3512F64C9877D563
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AM406670 Genomic DNA. Translation: CAL95761.1.
RefSeqiWP_011766869.1. NC_008702.1.

Genome annotation databases

EnsemblBacteriaiCAL95761; CAL95761; azo3144.
KEGGiazo:azo3144.
PATRICi21014724. VBIAzoSp26047_3190.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AM406670 Genomic DNA. Translation: CAL95761.1.
RefSeqiWP_011766869.1. NC_008702.1.

3D structure databases

ProteinModelPortaliA1KAA5.
SMRiA1KAA5. Positions 10-271.
ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi62928.azo3144.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiCAL95761; CAL95761; azo3144.
KEGGiazo:azo3144.
PATRICi21014724. VBIAzoSp26047_3190.

Phylogenomic databases

eggNOGiENOG4105CCG. Bacteria.
COG0413. LUCA.
HOGENOMiHOG000078427.
KOiK00606.
OMAiMAAGAQM.
OrthoDBiEOG63C0WN.

Enzyme and pathway databases

UniPathwayiUPA00028; UER00003.

Family and domain databases

Gene3Di3.20.20.60. 1 hit.
HAMAPiMF_00156. PanB.
InterProiIPR003700. Pantoate_hydroxy_MeTrfase.
IPR015813. Pyrv/PenolPyrv_Kinase-like_dom.
[Graphical view]
PANTHERiPTHR20881. PTHR20881. 1 hit.
PfamiPF02548. Pantoate_transf. 1 hit.
[Graphical view]
PIRSFiPIRSF000388. Pantoate_hydroxy_MeTrfase. 1 hit.
SUPFAMiSSF51621. SSF51621. 1 hit.
TIGRFAMsiTIGR00222. panB. 1 hit.
ProtoNetiSearch...

Publicationsi

  1. Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: BH72.

Entry informationi

Entry nameiPANB_AZOSB
AccessioniPrimary (citable) accession number: A1KAA5
Entry historyi
Integrated into UniProtKB/Swiss-Prot: July 24, 2007
Last sequence update: February 6, 2007
Last modified: December 9, 2015
This is version 66 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.