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Overview

Uniprot IDQ96PF2
Protein NameTestis-specific serine/threonine-protein kinase 2
Gene NameTSSK2
OrganismHomo sapiens

Kla Sites from experimental identification

Position Flanking peptide
246 KNLTCECKDLIYRML

Function

Testis-specific serine/threonine-protein kinase required during spermatid development. Phosphorylates TSKS at 'Ser-288' and SPAG16. Involved in the late stages of spermatogenesis, during the reconstruction of the cytoplasm. During spermatogenesis, required for the transformation of a ring-shaped structure around the base of the flagellum originating from the chromatoid body

Protein Sequence

10 MDDATVLRKK 20 GYIVGINLGK 30 GSYAKVKSAY 40 SERLKFNVAV 50 KIIDRKKTPT 60 DFVERFLPRE 70 MDILATVNHG 80 SIIKTYEIFE 90 TSDGRIYIIM 100 ELGVQGDLLE 110 FIKCQGALHE 120 DVARKMFRQL 130 SSAVKYCHDL 140 DIVHRDLKCE 150 NLLLDKDFNI 160 KLSDFGFSKR 170 CLRDSNGRII 180 LSKTFCGSAA 190 YAAPEVLQSI 200 PYQPKVYDIW 210 SLGVILYIMV 220 CGSMPYDDSD 230 IRKMLRIQKE 240 HRVDFPRSKN 250 LTCECKDLIY 260 RMLQPDVSQR 270 LHIDEILSHS 280 WLQPPKPKAT 290 SSASFKREGE 300 GKYRAECKLD 310 TKTGLRPDHR 320 PDHKLGAKTQ 330 HRLLVVPENE 340 NRMEDRLAET 350 SRAKDHHISG AEVGKAST

Gene Ontology

Classification GO ID Description
Cellular Component GO:0001669 acrosomal vesicle
Cellular Component GO:0005814 centriole
Cellular Component GO:0005737 cytoplasm
Cellular Component GO:0005634 nucleus
Molecular Function GO:0005524 ATP binding
Molecular Function GO:0000287 magnesium ion binding
Molecular Function GO:0106310 protein serine kinase activity
Molecular Function GO:0004674 protein serine/threonine kinase activity
Molecular Function GO:0044877 protein-containing complex binding
Biological Process GO:0046777 protein autophosphorylation
Biological Process GO:0007286 spermatid development

Reference

[1] Yan M, Tu H, Tang S, Gai Z, Shi Q et al.. Lactylated Proteomic Analysis Reveals Functional Implications of Lysine Lactylation In Asthenozoospermia.. Mol Cell Proteomics 24(12):101439. 2025 Dec. PMID: 41192556.