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Protein

3-methyl-2-oxobutanoate hydroxymethyltransferase

Gene

panB

Organism
Sulfolobus islandicus (strain M.16.27)
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. no protein annotated in this organism
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 bindingi45 – 451MagnesiumUniRule annotation
Metal bindingi84 – 841MagnesiumUniRule annotation
Binding sitei84 – 841Alpha-ketoisovalerateUniRule annotation
Binding sitei113 – 1131Alpha-ketoisovalerateUniRule annotation
Metal bindingi115 – 1151MagnesiumUniRule annotation
Active sitei182 – 1821Proton 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

BioCyciSISL427318:GH3D-195-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:M1627_0191
OrganismiSulfolobus islandicus (strain M.16.27)
Taxonomic identifieri427318 [NCBI]
Taxonomic lineageiArchaeaCrenarchaeotaThermoproteiSulfolobalesSulfolobaceaeSulfolobus
Proteomesi
  • UP000002307 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 – 2672673-methyl-2-oxobutanoate hydroxymethyltransferasePRO_1000203477Add
BLAST

Interactioni

Subunit structurei

Homodecamer; pentamer of dimers.UniRule annotation

Family & Domainsi

Region

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Regioni45 – 462Alpha-ketoisovalerate bindingUniRule annotation

Sequence similaritiesi

Belongs to the PanB family.UniRule annotation

Phylogenomic databases

HOGENOMiHOG000078427.
KOiK00606.
OMAiDMLGFFD.

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.

C3N136-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MKKVTIRDFI KKKSTKEKIT ILTAYDYPTA KIISNTGLDS ILVGDSLGMV
60 70 80 90 100
VLGYANTLNV TMRDMISHTR AVARANPPQL IVADMPFLSY EIDTKSAVKN
110 120 130 140 150
AGLLVKAGSD AIKLEGGEEM KDTVKAIVKA GIPVMGHIGL TPQRFLRLGG
160 170 180 190 200
FRTIGKTKQE EDQLIKDSLE LEDAGVFSLV IENTYVDIAK RITEKLNIPT
210 220 230 240 250
ICIGAGPYCD GQVLVINDLL GLSEFTPYFA KSYVNLKEII SNAINQYIID
260
VKNNKFPEKQ HYKEKES
Length:267
Mass (Da):29,502
Last modified:June 16, 2009 - v1
Checksum:i39725AD41540B0E7
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP001401 Genomic DNA. Translation: ACP54221.1.
RefSeqiWP_012710369.1. NC_012632.1.

Genome annotation databases

EnsemblBacteriaiACP54221; ACP54221; M1627_0191.
GeneIDi7813884.
KEGGisim:M1627_0191.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP001401 Genomic DNA. Translation: ACP54221.1.
RefSeqiWP_012710369.1. NC_012632.1.

3D structure databases

ModBaseiSearch...
MobiDBiSearch...

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiACP54221; ACP54221; M1627_0191.
GeneIDi7813884.
KEGGisim:M1627_0191.

Phylogenomic databases

HOGENOMiHOG000078427.
KOiK00606.
OMAiDMLGFFD.

Enzyme and pathway databases

UniPathwayiUPA00028; UER00003.
BioCyciSISL427318:GH3D-195-MONOMER.

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: M.16.27.

Entry informationi

Entry nameiPANB_SULIA
AccessioniPrimary (citable) accession number: C3N136
Entry historyi
Integrated into UniProtKB/Swiss-Prot: September 22, 2009
Last sequence update: June 16, 2009
Last modified: November 11, 2015
This is version 46 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

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.