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Protein

Protein-S-isoprenylcysteine O-methyltransferase

Gene

icmt-1

more
Organism
Dictyostelium discoideum (Slime mold)
Status
Reviewed-Annotation score: Annotation score: 5 out of 5-Experimental evidence at transcript leveli

Functioni

Methylates the C-terminal cysteine residues of small GTPases and the heterotrimeric G protein gamma subunit in response to cAMP. The methylation is required for intercellular signaling and regulation of cAMP waves propagation. It also seems to induce the activity of car1, a G protein-coupled receptor which senses extracellular cAMP during the aggregation phase of development.1 Publication

Catalytic activityi

S-adenosyl-L-methionine + protein C-terminal S-farnesyl-L-cysteine = S-adenosyl-L-homocysteine + protein C-terminal S-farnesyl-L-cysteine methyl ester.

Cofactori

Zn2+By similarityNote: Divalent metal cations. Probably Zn2+.By similarity

GO - Molecular functioni

GO - Biological processi

  • C-terminal protein methylation Source: dictyBase
  • establishment of cell polarity Source: dictyBase
  • nuclear envelope organization Source: dictyBase
  • protein localization to nucleus Source: dictyBase
  • regulation of aggregation involved in sorocarp development Source: dictyBase
  • regulation of G-protein coupled receptor protein signaling pathway Source: dictyBase
Complete GO annotation...

Keywords - Molecular functioni

Methyltransferase, Transferase

Keywords - Ligandi

S-adenosyl-L-methionine

Enzyme and pathway databases

ReactomeiR-DDI-163841. Gamma carboxylation, hypusine formation and arylsulfatase activation.

Names & Taxonomyi

Protein namesi
Recommended name:
Protein-S-isoprenylcysteine O-methyltransferase (EC:2.1.1.100)
Alternative name(s):
Isoprenylcysteine carboxylmethyltransferase
Prenylated protein carboxyl methyltransferase
Short name:
PPMT
Prenylcysteine carboxyl methyltransferase
Short name:
pcCMT
Gene namesi
Name:icmt-1
Synonyms:icmA
ORF Names:DDB_G0272799
AND
Name:icmt-2
Synonyms:icmA
ORF Names:DDB_G0273995
OrganismiDictyostelium discoideum (Slime mold)
Taxonomic identifieri44689 [NCBI]
Taxonomic lineageiEukaryotaAmoebozoaMycetozoaDictyosteliidaDictyostelium
Proteomesi
  • UP000002195 Componentsi: Chromosome 2, Unassembled WGS sequence

Organism-specific databases

dictyBaseiDDB_G0272799. icmA-1.
DDB_G0273995. icmA-2.

Subcellular locationi

Topology

Feature keyPosition(s)DescriptionActionsGraphical viewLength
Transmembranei26 – 46HelicalSequence analysisAdd BLAST21
Transmembranei53 – 73HelicalSequence analysisAdd BLAST21
Transmembranei92 – 112HelicalSequence analysisAdd BLAST21
Transmembranei116 – 136HelicalSequence analysisAdd BLAST21
Transmembranei184 – 204HelicalSequence analysisAdd BLAST21

GO - Cellular componenti

Complete GO annotation...

Keywords - Cellular componenti

Endoplasmic reticulum, Membrane

Pathology & Biotechi

Disruption phenotypei

Cells lacking both icmt-1 and icmt-2 do not propagate cAMP waves in a sustained manner and fail to aggregate, affecting differentiation and development.1 Publication

PTM / Processingi

Molecule processing

Feature keyPosition(s)DescriptionActionsGraphical viewLength
ChainiPRO_00003281751 – 237Protein-S-isoprenylcysteine O-methyltransferaseAdd BLAST237

Proteomic databases

PaxDbiQ558K8.

Expressioni

Developmental stagei

Induced by starvation and expressed throughout development, with a peak at 8 hours after starvation.1 Publication

Interactioni

Protein-protein interaction databases

STRINGi44689.DDB0252724.

Family & Domainsi

Sequence similaritiesi

Keywords - Domaini

Transmembrane, Transmembrane helix

Phylogenomic databases

eggNOGiKOG2628. Eukaryota.
COG2020. LUCA.
InParanoidiQ558K8.
KOiK00587.
OMAiPHDTHPD.
PhylomeDBiQ558K8.

Family and domain databases

InterProiIPR007269. ICMT_MeTrfase.
IPR025770. PPMT_MeTrfase.
[Graphical view]
PfamiPF04140. ICMT. 1 hit.
[Graphical view]
PROSITEiPS51564. SAM_ICMT. 1 hit.
[Graphical view]

Sequencei

Sequence statusi: Complete.

Q558K8-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MDQSEIVKLN KIKAKSAWLK KGAARSSAIS CGLGIGIGFG IALFIFSQTL
60 70 80 90 100
RGFGIYLAGL CTFHMWEYIW VTMYHPDKLS SKSFLLNHSP QFNMALLISF
110 120 130 140 150
IEFWIEWYFF PSLKTFSLWW VGAICMVFGQ IVRSVAMDTA GSNFTHLVQE
160 170 180 190 200
EKRDDHVLVT NGIYQYMRHP SYFGWFVWSV STQVILMNPI SIIGFGWASW
210 220 230
SFFSQRIENE EDYLIQFFGK SYKDYKKSVW SGIPGIH
Length:237
Mass (Da):27,379
Last modified:May 2, 2006 - v2
Checksum:i3F6961685B01C5DE
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF487784 Genomic DNA. Translation: AAL99548.1.
AAFI02000011 Genomic DNA. Translation: EAL70431.1.
AAFI02000009 Genomic DNA. Translation: EAL71037.2.
RefSeqiXP_644356.1. XM_639264.1.
XP_645058.2. XM_639966.2.

Genome annotation databases

EnsemblProtistsiEAL70431; EAL70431; DDB_G0273995.
EAL71037; EAL71037; DDB_G0272799.
GeneIDi8618733.
8619243.
KEGGiddi:DDB_G0272799.
ddi:DDB_G0273995.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
AF487784 Genomic DNA. Translation: AAL99548.1.
AAFI02000011 Genomic DNA. Translation: EAL70431.1.
AAFI02000009 Genomic DNA. Translation: EAL71037.2.
RefSeqiXP_644356.1. XM_639264.1.
XP_645058.2. XM_639966.2.

3D structure databases

ModBaseiSearch...
MobiDBiSearch...

Protein-protein interaction databases

STRINGi44689.DDB0252724.

Proteomic databases

PaxDbiQ558K8.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblProtistsiEAL70431; EAL70431; DDB_G0273995.
EAL71037; EAL71037; DDB_G0272799.
GeneIDi8618733.
8619243.
KEGGiddi:DDB_G0272799.
ddi:DDB_G0273995.

Organism-specific databases

dictyBaseiDDB_G0272799. icmA-1.
DDB_G0273995. icmA-2.

Phylogenomic databases

eggNOGiKOG2628. Eukaryota.
COG2020. LUCA.
InParanoidiQ558K8.
KOiK00587.
OMAiPHDTHPD.
PhylomeDBiQ558K8.

Enzyme and pathway databases

ReactomeiR-DDI-163841. Gamma carboxylation, hypusine formation and arylsulfatase activation.

Miscellaneous databases

PROiQ558K8.

Family and domain databases

InterProiIPR007269. ICMT_MeTrfase.
IPR025770. PPMT_MeTrfase.
[Graphical view]
PfamiPF04140. ICMT. 1 hit.
[Graphical view]
PROSITEiPS51564. SAM_ICMT. 1 hit.
[Graphical view]
ProtoNetiSearch...

Entry informationi

Entry nameiICMT_DICDI
AccessioniPrimary (citable) accession number: Q558K8
Secondary accession number(s): Q86AM7, Q8T623
Entry historyi
Integrated into UniProtKB/Swiss-Prot: April 8, 2008
Last sequence update: May 2, 2006
Last modified: November 2, 2016
This is version 75 of the entry and version 2 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)

Miscellaneousi

Caution

The gene for this protein is duplicated in strains AX3 and AX4. These strains contain a duplication of a segment of 750 kb of chromosome 2 compared to the corresponding sequence in strain AX2.Curated

Keywords - Technical termi

Complete proteome, Reference proteome

Documents

  1. Dictyostelium discoideum
    Dictyostelium discoideum: entries, gene names and cross-references to dictyBase
  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.