P06240 (LCK_MOUSE) Reviewed, UniProtKB/Swiss-Prot
Last modified
April 3, 2013.
Version 156.
History...
Names·Attributes·General annotation·Ontologies·Interactions·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Interactions·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Proto-oncogene tyrosine-protein kinase LCK EC=2.7.10.2 Alternative name(s): Leukocyte C-terminal Src kinase Short name=LSK Lymphocyte cell-specific protein-tyrosine kinase p56-LCK | ||||
| Gene names |
| ||||
| Organism | Mus musculus (Mouse) [Reference proteome] | ||||
| Taxonomic identifier | 10090 [NCBI] | ||||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Mus › Mus![]() |
Protein attributes
| Sequence length | 509 AA. |
| Sequence status | Complete. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Non-receptor tyrosine-protein kinase that plays an essential role in the selection and maturation of developing T-cells in the thymus and in the function of mature T-cells. Plays a key role in T-cell antigen receptor (TCR)-linked signal transduction pathways. Constitutively associated with the cytoplasmic portions of the CD4 and CD8 surface receptors. Association of the TCR with a peptide antigen-bound MHC complex facilitates the interaction of CD4 and CD8 with MHC class II and class I molecules, respectively, thereby recruiting the associated LCK protein to the vicinity of the TCR/CD3 complex. LCK then phosphorylates tyrosines residues within the immunoreceptor tyrosine-based activation motifs (ITAM) of the cytoplasmic tails of the TCR-gamma chains and CD3 subunits, initiating the TCR/CD3 signaling pathway. Once stimulated, the TCR recruits the tyrosine kinase ZAP70, that becomes phosphorylated and activated by LCK. Following this, a large number of signaling molecules are recruited, ultimately leading to lymphokine production. LCK also contributes to signaling by other receptor molecules. Associates directly with the cytoplasmic tail of CD2, which leads to hyperphosphorylation and activation of LCK. Also plays a role in the IL2 receptor-linked signaling pathway that controls the T-cell proliferative response. Binding of IL2 to its receptor results in increased activity of LCK. Is expressed at all stages of thymocyte development and is required for the regulation of maturation events that are governed by both pre-TCR and mature alpha beta TCR. Phosphorylates other substrates including RUNX3, PTK2B/PYK2, the microtubule-associated protein MAPT, RHOH or TYROBP By similarity. |
| Catalytic activity | ATP + a [protein]-L-tyrosine = ADP + a [protein]-L-tyrosine phosphate. |
| Enzyme regulation | The relative activities of the inhibitory tyrosine-protein kinase CSK and the activating tyrosine-protein phosphatase PTPRC/CD45 determine the level of LCK activity. These interactions allow rapid and efficient activation of LCK in response to TCR stimulation By similarity. |
| Subunit structure | Binds to the cytoplasmic domain of cell surface receptors, such as AXL, CD2, CD4, CD5, CD8, CD44, CD45 and CD122. Also binds to effector molecules, such as PI4K, VAV1, RASA1, FYB and to other protein kinases including CDK1, RAF1, ZAP70 and SYK. Binds to phosphatidylinositol 3'-kinase (PI3K) from T-lymphocytes through its SH3 domain and to the tyrosine phosphorylated form of KHDRBS1/p70 through its SH2 domain. Interacts with SQSTM1. Interacts with phosphorylated LIME1. Interacts with CBLB and PTPRH. Interacts with RUNX3. Forms a signaling complex with EPHA1, PTK2B AND PI3-KINASE; upon activation by EFNA1 which may regulate T-lymphocytes migration. Associates with ZAP70 and RHOH; these interactions allow LCK-mediated RHOH and CD3 subunit phosphorylation in the presence of functional ZAP70 By similarity. Ref.8 Ref.17 |
| Subcellular location | Cytoplasm. Cell membrane; Lipid-anchor; Cytoplasmic side. Note: Present in lipid rafts in an inactive form. Ref.18 |
| Tissue specificity | Present at a low level in most T-cells, and at an elevated level in LSTRA and Thy19 (T-cell lymphoma) cells. |
| Developmental stage | Levels remain relatively constant throughout T-cell ontogeny. |
| Domain | The SH2 domain mediates interaction with SQSTM1. Interaction is regulated by Ser-59 phosphorylation By similarity. |
| Post-translational modification | Autophosphorylated on Tyr-394, increasing enzymatic activity, this site is dephosphorylated by PTN22. Phosphorylated on Tyr-505 by CSK, decreasing activity. Dephosphorylated by PTPRC/CD45 By similarity. Ref.11 Ref.13 Myristoylation is required prior to palmitoylation. Ref.15 Ref.16 Palmitoylation regulates subcellular location By similarity. Ref.15 Ref.16 |
| Disruption phenotype | Mice show a dramatic reduction in the level of peripheral T-cells, with 5-10% of wild-type levels. T-cells also exhibit a 10-fold decrease in proliferative response. Ref.12 |
| Sequence similarities | Belongs to the protein kinase superfamily. Tyr protein kinase family. SRC subfamily. Contains 1 protein kinase domain. Contains 1 SH2 domain. Contains 1 SH3 domain. |
Ontologies
Binary interactions
With | Entry | #Exp. | IntAct | Notes |
|---|---|---|---|---|
| O92972 | 2 | EBI-1401,EBI-710506 | From a different organism. | |
| P27958 | 3 | EBI-1401,EBI-706378 | From a different organism. | |
| KHDRBS1 | Q07666 | 2 | EBI-1401,EBI-1364 | From a different organism. |
| PTPRC | P08575 | 2 | EBI-1401,EBI-1341 | From a different organism. |
| Sh2d2a | Q9QXK9 | 3 | EBI-1401,EBI-1644 |
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||
Molecule processing | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Chain | 1 – 509 | 509 | Proto-oncogene tyrosine-protein kinase LCK | PRO_0000088125 | |||||
Regions | |||||||||
| Domain | 61 – 121 | 61 | SH3 | ||||||
| Domain | 127 – 224 | 98 | SH2 | ||||||
| Domain | 245 – 498 | 254 | Protein kinase | ||||||
| Nucleotide binding | 251 – 259 | 9 | ATP By similarity | ||||||
| Region | 1 – 72 | 72 | Interactions with CD4 and CD8 | ||||||
| Region | 154 – 242 | 89 | Interaction with PTPRH By similarity | ||||||
Sites | |||||||||
| Active site | 364 | 1 | Proton acceptor By similarity | ||||||
| Binding site | 273 | 1 | ATP By similarity | ||||||
Amino acid modifications | |||||||||
| Modified residue | 102 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 159 | 1 | Phosphothreonine By similarity | ||||||
| Modified residue | 162 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 194 | 1 | Phosphoserine By similarity | ||||||
| Modified residue | 394 | 1 | Phosphotyrosine; by autocatalysis Ref.19 | ||||||
| Modified residue | 505 | 1 | Phosphotyrosine; by CSK By similarity | ||||||
| Lipidation | 2 | 1 | N-myristoyl glycine Probable | ||||||
| Lipidation | 3 | 1 | S-palmitoyl cysteine Ref.15 Ref.16 | ||||||
| Lipidation | 5 | 1 | S-palmitoyl cysteine Ref.15 Ref.16 | ||||||
Experimental info | |||||||||
| Mutagenesis | 2 | 1 | G → A: Abolishes myristoylation and palmitoylation. Ref.16 | ||||||
| Mutagenesis | 3 – 5 | 3 | CVC → SVK: Complete loss of interaction with CD4 or CD8. Ref.8 Ref.15 Ref.16 | ||||||
| Mutagenesis | 3 | 1 | C → S: Abolishes plasma membrane association; when associated with S-41. Reduced palmitoylation level. Ref.15 Ref.16 | ||||||
| Mutagenesis | 5 | 1 | C → K: Reduced palmitoylation level. Ref.15 Ref.16 | ||||||
| Mutagenesis | 5 | 1 | C → S: Abolishes plasma membrane association; when associated with S-21. Ref.15 Ref.16 | ||||||
| Mutagenesis | 20 | 1 | C → S: Complete loss of interaction with CD4 or CD8. Ref.8 | ||||||
| Mutagenesis | 23 | 1 | C → S: Complete loss of interaction with CD4 or CD8. Ref.8 | ||||||
| Mutagenesis | 269 | 1 | K → N: Reduced activity. | ||||||
| Mutagenesis | 270 | 1 | V → L: Reduced activity. | ||||||
| Mutagenesis | 271 | 1 | A → S: Reduced activity. | ||||||
| Mutagenesis | 272 | 1 | V → A: Reduced activity. | ||||||
| Mutagenesis | 273 | 1 | K → R: Loss of activity. Ref.10 | ||||||
| Mutagenesis | 274 | 1 | S → N: Reduced activity. | ||||||
| Mutagenesis | 275 | 1 | L → M: Reduced activity. | ||||||
| Mutagenesis | 276 | 1 | K → V: Reduced activity. | ||||||
| Mutagenesis | 505 | 1 | Y → F: Causes thymic tumors. Ref.7 Ref.11 | ||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "A lymphocyte-specific protein-tyrosine kinase gene is rearranged and overexpressed in the murine T cell lymphoma LSTRA." Marth J.D., Peet R., Krebs E.G., Perlmutter R.M. Cell 43:393-404(1985) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA]. |
| [2] | "Expression of a new tyrosine protein kinase is stimulated by retrovirus promoter insertion." Voronova A.F., Sefton B.M. Nature 319:682-685(1986) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA]. |
| [3] | "The transcriptional landscape of the mammalian genome." Carninci P., Kasukawa T., Katayama S., Gough J., Frith M.C., Maeda N., Oyama R., Ravasi T., Lenhard B., Wells C., Kodzius R., Shimokawa K., Bajic V.B., Brenner S.E., Batalov S., Forrest A.R., Zavolan M., Davis M.J. Hayashizaki Y.Science 309:1559-1563(2005) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Strain: NOD. Tissue: Thymus. |
| [4] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Strain: FVB/N. Tissue: Salivary gland. |
| [5] | "Structure of the murine lck gene and its rearrangement in a murine lymphoma cell line." Garvin A.M., Pawar S., Marth J.D., Perlmutter R.M. Mol. Cell. Biol. 8:3058-3064(1988) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-35. |
| [6] | "Two lck transcripts containing different 5' untranslated regions are present in T cells." Voronova A.F., Adler H.T., Sefton B.M. Mol. Cell. Biol. 7:4407-4413(1987) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-11. |
| [7] | "Avian reovirus mRNAs are nonfunctional in infected mouse cells: translational basis for virus host-range restriction." Amrein K.E., Sefton B.M. Proc. Natl. Acad. Sci. U.S.A. 85:4257-4261(1988) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS OF TYR-505. |
| [8] | "Interaction of the unique N-terminal region of tyrosine kinase p56lck with cytoplasmic domains of CD4 and CD8 is mediated by cysteine motifs." Turner J.M., Brodsky M.H., Irving B.A., Levin S.D., Perlmutter R.M., Littman D.R. Cell 60:755-765(1990) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH CD4 AND CD8, MUTAGENESIS OF 3-CYS--CYS-5; CYS-20 AND CYS-23. |
| [9] | "Creation and characterization of temperature-sensitive mutants of the lck tyrosine protein kinase." Hurley T.R., Amrein K.E., Sefton B.M. J. Virol. 66:7406-7413(1992) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS. |
| [10] | "Enhancement of T-cell responsiveness by the lymphocyte-specific tyrosine protein kinase p56lck." Abraham N., Miceli M.C., Parnes J.C., Veillette A. Nature 350:62-66(1991) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS OF LYS-273. |
| [11] | "Thymic tumorigenesis induced by overexpression of p56lck." Abraham K.M., Levin S.D., Marth J.D., Forbush K.A., Perlmutter R.M. Proc. Natl. Acad. Sci. U.S.A. 88:3977-3981(1991) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION AT TYR-505, MUTAGENESIS OF TYR-505. |
| [12] | "Profound block in thymocyte development in mice lacking p56lck." Molina T.J., Kishihara K., Siderovski D.P., van Ewijk W., Narendran A., Timms E., Wakeham A., Paige C.J., Hartmann K.U., Veillette A. Nature 357:161-164(1992) [PubMed] [Europe PMC] [Abstract] Cited for: DISRUPTION PHENOTYPE. |
| [13] | "Negative regulation of T-cell receptor signalling by tyrosine protein kinase p50csk." Chow L.M., Fournel M., Davidson D., Veillette A. Nature 365:156-160(1993) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION BY CSK. |
| [14] | "The conserved lysine of the catalytic domain of protein kinases is actively involved in the phosphotransfer reaction and not required for anchoring ATP." Carrera A.C., Alexandrov K., Roberts T.M. Proc. Natl. Acad. Sci. U.S.A. 90:442-446(1993) [PubMed] [Europe PMC] [Abstract] Cited for: MUTAGENESIS. |
| [15] | "Palmitylation of an amino-terminal cysteine motif of protein tyrosine kinases p56lck and p59fyn mediates interaction with glycosyl-phosphatidylinositol-anchored proteins." Shenoy-Scaria A.M., Timson L.K., Kwong J., Shaw A.S., Lublin D.M. Mol. Cell. Biol. 13:6385-6392(1993) [PubMed] [Europe PMC] [Abstract] Cited for: PALMITOYLATION AT CYS-3 AND CYS-5, MUTAGENESIS OF CYS-3 AND CYS-5. |
| [16] | "Palmitoylation of multiple Src-family kinases at a homologous N-terminal motif." Koegl M., Zlatkine P., Ley S.C., Courtneidge S.A., Magee A.I. Biochem. J. 303:749-753(1994) [PubMed] [Europe PMC] [Abstract] Cited for: PALMITOYLATION AT CYS-3 AND CYS-5, MYRISTOYLATION AT GLY-2, MUTAGENESIS OF GLY-2; CYS-3 AND CYS-5. |
| [17] | "Negative regulation of lymphocyte activation and autoimmunity by the molecular adaptor Cbl-b." Bachmaier K., Krawczyk C., Kozieradzki I., Kong Y.-Y., Sasaki T., Oliveira-dos-Santos A., Mariathasan S., Bouchard D., Wakeham A., Itie A., Le J., Ohashi P.S., Sarosi I., Nishina H., Lipkowitz S., Penninger J.M. Nature 403:211-216(2000) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH CBLB. |
| [18] | "Fyn is essential for tyrosine phosphorylation of Csk-binding protein/phosphoprotein associated with glycolipid-enriched microdomains in lipid rafts in resting T cells." Yasuda K., Nagafuku M., Shima T., Okada M., Yagi T., Yamada T., Minaki Y., Kato A., Tani-Ichi S., Hamaoka T., Kosugi A. J. Immunol. 169:2813-2817(2002) [PubMed] [Europe PMC] [Abstract] Cited for: SUBCELLULAR LOCATION. |
| [19] | "Immunoaffinity profiling of tyrosine phosphorylation in cancer cells." Rush J., Moritz A., Lee K.A., Guo A., Goss V.L., Spek E.J., Zhang H., Zha X.-M., Polakiewicz R.D., Comb M.J. Nat. Biotechnol. 23:94-101(2005) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION [LARGE SCALE ANALYSIS] AT TYR-394, MASS SPECTROMETRY. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | M12056 mRNA. Translation: AAB59674.1. X03533 mRNA. Translation: CAA27234.1. X03533 mRNA. Translation: CAA27235.1. Sequence problems. X03533 mRNA. Translation: CAA27236.1. Sequence problems. AK088001 mRNA. Translation: BAC40086.1. BC011474 mRNA. Translation: AAH11474.1. M21511 Genomic DNA. Translation: AAA39422.1. Sequence problems. M18098 Genomic DNA. Translation: AAA39421.1. |
| IPI | IPI00555017. |
| PIR | I48845. |
| RefSeq | NP_001155905.1. NM_001162433.1. NP_034823.1. NM_010693.3. |
| UniGene | Mm.293753. |
3D structure databases | |
| ProteinModelPortal | P06240. |
| SMR | P06240. Positions 7-33, 64-509. |
| ModBase | Search... |
Protein-protein interaction databases | |
| IntAct | P06240. 14 interactions. |
| MINT | MINT-85459. |
PTM databases | |
| PhosphoSite | P06240. |
Proteomic databases | |
| PaxDb | P06240. |
| PRIDE | P06240. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENSMUST00000067240; ENSMUSP00000066209; ENSMUSG00000000409. ENSMUST00000102596; ENSMUSP00000099656; ENSMUSG00000000409. |
| GeneID | 16818. |
| KEGG | mmu:16818. |
Organism-specific databases | |
| CTD | 3932. |
| MGI | MGI:96756. Lck. |
Phylogenomic databases | |
| eggNOG | COG0515. |
| GeneTree | ENSGT00620000087866. |
| HOGENOM | HOG000233858. |
| HOVERGEN | HBG008761. |
| InParanoid | P06240. |
| KO | K05856. |
| OrthoDB | EOG4640BM. |
Enzyme and pathway databases | |
| BRENDA | 2.7.10.2. 3474. |
| Reactome | REACT_107772. Immune System. REACT_115202. Signal Transduction. |
Gene expression databases | |
| ArrayExpress | P06240. |
| Bgee | P06240. |
| CleanEx | MM_LCK. |
| Genevestigator | P06240. |
| GermOnline | ENSMUSG00000000409. Mus musculus. |
Family and domain databases | |
| Gene3D | 3.30.505.10. 1 hit. |
| InterPro | IPR011009. Kinase-like_dom. IPR000719. Prot_kinase_cat_dom. IPR017441. Protein_kinase_ATP_BS. IPR001245. Ser-Thr/Tyr_kinase_cat_dom. IPR000980. SH2. IPR001452. SH3_domain. IPR008266. Tyr_kinase_AS. IPR020635. Tyr_kinase_cat_dom. [Graphical view] |
| Pfam | PF07714. Pkinase_Tyr. 1 hit. PF00017. SH2. 1 hit. PF00018. SH3_1. 1 hit. [Graphical view] |
| PRINTS | PR00401. SH2DOMAIN. PR00452. SH3DOMAIN. PR00109. TYRKINASE. |
| SMART | SM00252. SH2. 1 hit. SM00326. SH3. 1 hit. SM00219. TyrKc. 1 hit. [Graphical view] |
| SUPFAM | SSF56112. Kinase_like. 1 hit. SSF50044. SH3. 1 hit. |
| PROSITE | PS00107. PROTEIN_KINASE_ATP. 1 hit. PS50011. PROTEIN_KINASE_DOM. 1 hit. PS00109. PROTEIN_KINASE_TYR. 1 hit. PS50001. SH2. 1 hit. PS50002. SH3. 1 hit. [Graphical view] |
| ProtoNet | Search... |
Other | |
| BindingDB | P06240. |
| ChEMBL | CHEMBL2480. |
| NextBio | 290704. |
| SOURCE | Search... |
Entry information
| Entry name | LCK_MOUSE | ||||||||
| Accession | Primary (citable) accession number: P06240 Secondary accession number(s): Q61794 Q91X65 | ||||||||
| Entry history |
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| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| Human and mouse protein kinases Human and mouse protein kinases: classification and index |
| MGD cross-references Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
