UniProt functional annotation for P08922



	UniProt functional annotation for P08922

UniProt code: P08922.

Organism: Homo sapiens (Human).

Taxonomy: Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.

Function: Orphan receptor tyrosine kinase (RTK) that plays a role in epithelial cell differentiation and regionalization of the proximal epididymal epithelium. May activate several downstream signaling pathways related to cell differentiation, proliferation, growth and survival including the PI3 kinase-mTOR signaling pathway. Mediates the phosphorylation of PTPN11, an activator of this pathway. May also phosphorylate and activate the transcription factor STAT3 to control anchorage-independent cell growth. Mediates the phosphorylation and the activation of VAV3, a guanine nucleotide exchange factor regulating cell morphology. May activate other downstream signaling proteins including AKT1, MAPK1, MAPK3, IRS1 and PLCG2. {ECO:0000269|PubMed:11094073, ECO:0000269|PubMed:16885344}.

Catalytic activity: Reaction=ATP + L-tyrosyl-[protein] = ADP + H(+) + O-phospho-L-tyrosyl- [protein]; Xref=Rhea:RHEA:10596, Rhea:RHEA-COMP:10136, Rhea:RHEA- COMP:10137, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, ChEBI:CHEBI:46858, ChEBI:CHEBI:82620, ChEBI:CHEBI:456216; EC=2.7.10.1; Evidence={ECO:0000255|PROSITE-ProRule:PRU10028};

Activity regulation: Inhibited by dephosphorylation by PTPN6. {ECO:0000250}.

Subunit: Interacts with PTPN6 (via SH2 1 domain); the interaction is direct and promotes ROS1 dephosphorylation (By similarity). Interacts with PTPN11; may activate the PI3 kinase-mTOR signaling pathway. Interacts with VAV3; constitutive interaction mediating VAV3 phosphorylation. {ECO:0000250, ECO:0000269|PubMed:11094073, ECO:0000269|PubMed:16885344}.

Subcellular location: Cell membrane {ECO:0000305}; Single-pass type I membrane protein {ECO:0000305}.

Tissue specificity: Expressed in brain. Expression is increased in primary gliomas. {ECO:0000269|PubMed:8143271}.

Ptm: Phosphorylated. Probably autophosphorylates. Phosphorylation at Tyr-2274 is required for the interaction with PTPN6 that mediates ROS1 dephosphorylation (By similarity). Phosphorylation at Tyr-2274 stimulates the kinase activity and the activation of the ERK1 signaling cascade (By similarity). Phosphorylation at Tyr-2274 and/or Tyr-2334 recruits PTPN11. {ECO:0000250, ECO:0000269|PubMed:12538861}.

Disease: Note=A chromosomal aberration involving ROS1 is found in a glioblastoma multiforme sample. An intra-chromosomal deletion del(6)(q21q21) is responsible for the formation of GOPC-ROS1 chimeric protein which is localized to the Golgi and has a constitutive receptor tyrosine kinase activity. A SLC34A2-ROS1 chimeric protein produced in non-small cell lung cancer cells also retains a constitutive kinase activity. A third type of chimeric protein CD74-ROS1 was also identified in those cells. {ECO:0000269|PubMed:12661006}.

Similarity: Belongs to the protein kinase superfamily. Tyr protein kinase family. Insulin receptor subfamily. {ECO:0000255|PROSITE- ProRule:PRU00159}.

Annotations taken from UniProtKB at the EBI.


Organism:		Homo sapiens (Human).
Taxonomy:		Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Primates; Haplorrhini; Catarrhini; Hominidae; Homo.



Function:		Orphan receptor tyrosine kinase (RTK) that plays a role in epithelial cell differentiation and regionalization of the proximal epididymal epithelium. May activate several downstream signaling pathways related to cell differentiation, proliferation, growth and survival including the PI3 kinase-mTOR signaling pathway. Mediates the phosphorylation of PTPN11, an activator of this pathway. May also phosphorylate and activate the transcription factor STAT3 to control anchorage-independent cell growth. Mediates the phosphorylation and the activation of VAV3, a guanine nucleotide exchange factor regulating cell morphology. May activate other downstream signaling proteins including AKT1, MAPK1, MAPK3, IRS1 and PLCG2. {ECO:0000269\|PubMed:11094073, ECO:0000269\|PubMed:16885344}.


Catalytic activity:		Reaction=ATP + L-tyrosyl-[protein] = ADP + H(+) + O-phospho-L-tyrosyl- [protein]; Xref=Rhea:RHEA:10596, Rhea:RHEA-COMP:10136, Rhea:RHEA- COMP:10137, ChEBI:CHEBI:15378, ChEBI:CHEBI:30616, ChEBI:CHEBI:46858, ChEBI:CHEBI:82620, ChEBI:CHEBI:456216; EC=2.7.10.1; Evidence={ECO:0000255\|PROSITE-ProRule:PRU10028};
Activity regulation:		Inhibited by dephosphorylation by PTPN6. {ECO:0000250}.
Subunit:		Interacts with PTPN6 (via SH2 1 domain); the interaction is direct and promotes ROS1 dephosphorylation (By similarity). Interacts with PTPN11; may activate the PI3 kinase-mTOR signaling pathway. Interacts with VAV3; constitutive interaction mediating VAV3 phosphorylation. {ECO:0000250, ECO:0000269\|PubMed:11094073, ECO:0000269\|PubMed:16885344}.
Subcellular location:		Cell membrane {ECO:0000305}; Single-pass type I membrane protein {ECO:0000305}.
Tissue specificity:		Expressed in brain. Expression is increased in primary gliomas. {ECO:0000269\|PubMed:8143271}.
Ptm:		Phosphorylated. Probably autophosphorylates. Phosphorylation at Tyr-2274 is required for the interaction with PTPN6 that mediates ROS1 dephosphorylation (By similarity). Phosphorylation at Tyr-2274 stimulates the kinase activity and the activation of the ERK1 signaling cascade (By similarity). Phosphorylation at Tyr-2274 and/or Tyr-2334 recruits PTPN11. {ECO:0000250, ECO:0000269\|PubMed:12538861}.
Disease:		Note=A chromosomal aberration involving ROS1 is found in a glioblastoma multiforme sample. An intra-chromosomal deletion del(6)(q21q21) is responsible for the formation of GOPC-ROS1 chimeric protein which is localized to the Golgi and has a constitutive receptor tyrosine kinase activity. A SLC34A2-ROS1 chimeric protein produced in non-small cell lung cancer cells also retains a constitutive kinase activity. A third type of chimeric protein CD74-ROS1 was also identified in those cells. {ECO:0000269\|PubMed:12661006}.
Similarity:		Belongs to the protein kinase superfamily. Tyr protein kinase family. Insulin receptor subfamily. {ECO:0000255\|PROSITE- ProRule:PRU00159}.