SFRS protein kinase 2 (SRPK2)

Target Class

Kinase

Family

CMGC

Official Symbol

SRPK2

Entrez Gene ID

6733

Species

Human

Accession Number

AAC05299.1

Alias Names

H_RG152G17.1a; H_RG152G17.1b; SFRS protein kinase 2; SFRSK2; SR protein kinase 2; SR-protein-specific kinase 2; SRSF protein kinase 2; WUGSC:H_RG152G17.1a; serine kinase SRPK2; serine/arginine-rich protein-specific kinase 2; serine/arginine-rich splicing factor kinase 2; serine/threonine-protein kinase SRPK2

Background

Serine/arginine-rich protein-specific kinase which specifically phosphorylates its substrates at serine residues located in regions rich in arginine/serine dipeptides, known as RS domains and is involved in the phosphorylation of SR splicing factors and the regulation of splicing. Promotes neuronal apoptosis by up-regulating cyclin-D1 (CCND1) expression. This is done by the phosphorylation of SRSF2, leading to the suppression of p53/TP53 phosphorylation thereby relieving the repressive effect of p53/TP53 on cyclin-D1 (CCND1) expression. Phosphorylates ACIN1, and redistributes it from the nuclear speckles to the nucleoplasm, resulting in cyclin A1 but not cyclin A2 up- regulation. Plays an essential role in splicesomal B complex formation via the phosphorylation of DDX23/PRP28. Can mediate hepatitis B virus (HBV) core protein phosphorylation. Plays a negative role in the regulation of HBV replication through a mechanism not involving the phosphorylation of the core protein but by reducing the packaging efficiency of the pregenomic RNA (pgRNA) without affecting the formation of the viral core particles.

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