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B0KWC1 (PI4KB_CALJA) Reviewed, UniProtKB/Swiss-Prot

Last modified October 19, 2011. Version 23. Feed History...

Clusters with 100%, 90%, 50% identity | Documents (1) | Third-party data text xml rdf/xml gff fasta
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Names and origin

Protein namesRecommended name:
Phosphatidylinositol 4-kinase beta

Short name=PI4K-beta
Short name=PI4Kbeta
Short name=PtdIns 4-kinase beta
EC=2.7.1.67
Gene names
Name:PI4KB
Synonyms:PIK4CB
OrganismCallithrix jacchus (White-tufted-ear marmoset) [Complete proteome]
Taxonomic identifier9483 [NCBI]
Taxonomic lineageEukaryotaMetazoaChordataCraniataVertebrataEuteleostomiMammaliaEutheriaEuarchontogliresPrimatesHaplorrhiniPlatyrrhiniCebidaeCallitrichinaeCallithrix

Protein attributes

Sequence length816 AA.
Sequence statusComplete.
Protein existenceInferred from homology

General annotation (Comments)

Function

Phosphorylates phosphatidylinositol (PI) in the first committed step in the production of the second messenger inositol-1,4,5,-trisphosphate (PIP). May regulate Golgi disintegration/reorganization during mitosis, possibly via its phosphorylation By similarity. Involved in Golgi-to-plasma membrane trafficking By similarity.

Catalytic activity

ATP + 1-phosphatidyl-1D-myo-inositol = ADP + 1-phosphatidyl-1D-myo-inositol 4-phosphate.

Enzyme regulation

Inhibited by wortmannin By similarity. Increased kinase activity upon interaction with NCS1/FREQ By similarity.

Subunit structure

Interacts with NCS1/FREQ in a calcium-independent manner By similarity. Interacts with CALN1/CABP8 and CALN2/CABP7; in a calcium-dependent manner By similarity. This binding competes with NCS1/FREQ binding By similarity. Interacts with ARF1 and ARF3 By similarity.

Subcellular location

Endomembrane system By similarity. Mitochondrion outer membrane; Peripheral membrane protein By similarity. Rough endoplasmic reticulum membrane; Peripheral membrane protein By similarity. Golgi apparatus By similarity. Note: Found in the outer membrane of mitochondria and membranes of the rough endoplasmic reticulum. Recruited to the Golgi complex by the small GTPase ARF to stimulate the synthesis of phosphatidylinositol 4,5-biphosphate (PIP2) on the Golgi complex By similarity.

Sequence similarities

Belongs to the PI3/PI4-kinase family. Type III PI4K subfamily.

Contains 1 PI3K/PI4K domain.

Contains 1 PIK helical domain.

Sequence annotation (Features)

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifier

Molecule processing

Chain1 – 816816Phosphatidylinositol 4-kinase beta
PRO_0000365163

Regions

Domain52 – 242191PIK helical
Domain559 – 765207PI3K/PI4K
Compositional bias117 – 1204Poly-Arg

Amino acid modifications

Modified residue2581Phosphoserine By similarity
Modified residue2631Phosphothreonine By similarity
Modified residue2661Phosphoserine By similarity
Modified residue2771Phosphoserine By similarity
Modified residue2801Phosphothreonine By similarity
Modified residue2941Phosphoserine By similarity
Modified residue4281Phosphoserine By similarity
Modified residue4381Phosphothreonine By similarity
Modified residue5111Phosphoserine By similarity
Modified residue5171Phosphothreonine By similarity
Modified residue5191Phosphothreonine By similarity

Sequences

Sequence LengthMass (Da)Tools
B0KWC1 [UniParc].

Last modified March 18, 2008. Version 1.
Checksum: 599BA628F99126C0

FASTA81691,377
        10         20         30         40         50         60 
MGDTVVEPAP LKPTSEPTSG PPGNNGGSLL SVITEGVGEL SVIDPEVAQK ACQDVLEKVK 

        70         80         90        100        110        120 
LLHGGVAVSS RGAPLELVNG DGVDSEIRCL DDPPAQIREE EDEMGASVAS GTAKGARRRR 

       130        140        150        160        170        180 
QNNSAKQSWL LRLFESKLFD ISMAISYLYN SKEPGVQAYI GNRLFCFRNE DVDFYLPQLL 

       190        200        210        220        230        240 
NMYIHMDEDV GDAIKPYIVY RCRQSINFSL QCALLLGAYS SDMHISTQRH SRGTKLRKLI 

       250        260        270        280        290        300 
LSDELKPAHR KRELPSLSPA PDTGLSPSKR THQRSKSDAT ASISLSSNLK RTASNPKVEN 

       310        320        330        340        350        360 
EDEELSSSTE SIDNSFSSPV RLAPEREFIK SLMAIGKRLA TLPTKEQKTQ RLISELSLLN 

       370        380        390        400        410        420 
HKLPARVWLP TAGFDHHVVR VPHTQAVVLN SKDKAPYLIY VEVLECENFD TTSVPARIPE 

       430        440        450        460        470        480 
NRIRSTRSVE NLPECGITHE QRAGSFSTVP NYDNDDEAWS VDDIGELQVE LPEVHTNSCD 

       490        500        510        520        530        540 
NISQFSVDSI TSQESKEPVF IAAGDIRRRL SEQLAHTPTA FKRDPEDPSA VALKEPWQEK 

       550        560        570        580        590        600 
VRRIREGSPY GHLPNWRLLS VIVKCGDDLR QELLAFQVLK QLQSIWEQER VPLWIKPYKI 

       610        620        630        640        650        660 
LVISADSGMI EPVVNAVSIH QVKKQSQLSL LDYFLQEHGS YTTEAFLSAQ RNFVQSCAGY 

       670        680        690        700        710        720 
CLVCYLLQVK DRHNGNILLD AEGHIIHIDF GFILSSSPRN LGFETSAFKL TTEFVDVMGG 

       730        740        750        760        770        780 
LDGDMFNYYK MLMLQGLIAA RKHMDKVVQI VEIMQQGSQL PCFHGSSTIR NLKERFHMSM 

       790        800        810 
TEEQLQLLVE QMVDGSMRSI TTKLYDGFQY LTNGIM 

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Cross-references

Sequence databases

EMBL
GenBank
DDBJ
DP000572 Genomic DNA. Translation: ABY82093.1.

3D structure databases

ProteinModelPortalB0KWC1.
ModBaseSearch...

Protocols and materials databases

StructuralBiologyKnowledgebaseSearch...

Phylogenomic databases

GeneTreeENSGT00550000074892.
HOVERGENHBG053597.
OrthoDBEOG49078C.

Family and domain databases

InterProIPR011009. Kinase-like_dom.
IPR000403. PI3/4_kinase_cat.
IPR018936. PI3/4_kinase_CS.
IPR015433. PI_Kinase.
[Graphical view]
Gene3DG3DSA:1.10.1070.11. PI3/4_kinase_cat. 1 hit.
PANTHERPTHR10048. PI_Kinase. 1 hit.
PfamPF00454. PI3_PI4_kinase. 1 hit.
[Graphical view]
SMARTSM00146. PI3Kc. 1 hit.
[Graphical view]
SUPFAMSSF56112. Kinase_like. 1 hit.
PROSITEPS00915. PI3_4_KINASE_1. 1 hit.
PS00916. PI3_4_KINASE_2. 1 hit.
PS50290. PI3_4_KINASE_3. 1 hit.
PS51545. PIK_HELICAL. 1 hit.
[Graphical view]
ProtoNetSearch...

Entry information

Entry namePI4KB_CALJA
AccessionPrimary (citable) accession number: B0KWC1
Entry history
Integrated into UniProtKB/Swiss-Prot: March 3, 2009
Last sequence update: March 18, 2008
Last modified: October 19, 2011
This is version 23 of the entry and version 1 of the sequence. [Complete history]
Entry statusReviewed (UniProtKB/Swiss-Prot)
Annotation programChordata Protein Annotation Program

Relevant documents

SIMILARITY comments

Index of protein domains and families