Adapter molecule crk also known as proto-oncogene c-Crk is a

protein Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residue (biochemistry), residues. Proteins perform a vast array of functions within organisms, including Enzyme catalysis, catalysing metab ...

that in humans is encoded by the ''CRK''

gene In biology, the word gene has two meanings. The Mendelian gene is a basic unit of heredity. The molecular gene is a sequence of nucleotides in DNA that is transcribed to produce a functional RNA. There are two types of molecular genes: protei ...

. The CRK protein participates in the

Reelin Reelin, encoded by the ''RELN'' gene, is a large secreted extracellular matrix glycoprotein that helps regulate processes of neuronal migration and positioning in the developing brain by controlling cell–cell interactions. Besides this importa ...

signaling cascade downstream of

DAB1 The Disabled-1 (Dab1) gene encodes a key regulator of Reelin signaling. Reelin is a large glycoprotein secreted by neurons of the developing brain, particularly Cajal-Retzius cells. DAB1 functions downstream of Reln in a signaling pathway that c ...

Function

Adapter molecule crk is a member of an adapter protein family that binds to several tyrosine-phosphorylated proteins. This protein has several SH2 and SH3 domains (src-homology domains) and is involved in several signaling pathways, recruiting cytoplasmic proteins in the vicinity of

tyrosine kinase A tyrosine kinase is an enzyme that can transfer a phosphate group from ATP to the tyrosine residues of specific proteins inside a cell. It functions as an "on" or "off" switch in many cellular functions. Tyrosine kinases belong to a larger cla ...

through SH2-phosphotyrosine interaction. The

N-terminal The N-terminus (also known as the amino-terminus, NH2-terminus, N-terminal end or amine-terminus) is the start of a protein or polypeptide, referring to the free amine group (-NH2) located at the end of a polypeptide. Within a peptide, the amin ...

SH2 domain of this protein functions as a positive regulator of transformation whereas the

C-terminal The C-terminus (also known as the carboxyl-terminus, carboxy-terminus, C-terminal tail, carboxy tail, C-terminal end, or COOH-terminus) is the end of an amino acid chain (protein or polypeptide), terminated by a free carboxyl group (-COOH). When t ...

SH3 domain functions as a negative regulator of transformation. Two alternative transcripts encoding different isoforms with distinct biological activity have been described. Crk together with

CrkL Crk-like protein is a protein that in humans is encoded by the CRKL gene. Function v-CRK avian sarcoma virus CT10-homolog-like contains one SH2 domain and two SH3 domains. CRKL has been shown to activate the RAS and JUN kinase signaling pat ...

participates in the

signaling cascade downstream of

. v-Crk, a transforming oncoprotein from avian sarcoma viruses, is a fusion of viral "gag" protein with the SH2 and SH3 domains of cellular Crk. The name Crk is from "CT10 Regulator of Kinase" where CT10 is the avian virus from which was isolated a protein, lacking kinase domains, but capable of stimulating phosphorylation of tyrosines in cells. Crk should not be confused with Src, which also has cellular (c-Src) and viral (v-Src) forms and is involved in some of the same signaling pathways but is a protein tyrosine-kinase.

Interactions

CRK (gene) has been shown to

interact Advocates for Informed Choice, dba interACT or interACT Advocates for Intersex Youth, is a 501(c)(3) nonprofit organization advocating for the legal and human rights of children with intersex traits. The organization was founded in 2006 and fo ...

with: *

BCAR1 Breast cancer anti-estrogen resistance protein 1 is a protein that in humans is encoded by the ''BCAR1'' gene. Gene BCAR1 is localized on chromosome 16 on region q, on the negative strand and it consists of seven exons. Eight different gene i ...

, *

Cbl gene E3 ubiquitin-protein ligase CBL is an enzyme that is humans is encoded by the ''CBL'' (Casitas B-lineage Lymphoma) gene. ''CBL'' gene is the founding member the Cbl family. The protein CBL which is an Ubiquitin ligase, E3 ubiquitin-protein liga ...

, *

Dock180 Dedicator of cytokinesis protein 1 (Dock1), also (DOCK180), is a large (~180 kDa) protein encoded in the human by the ''DOCK1'' gene, involved in intracellular signalling networks. It is the mammalian ortholog of the ''C. elegans'' protein CED ...

, *

EPS15 Epidermal growth factor receptor substrate 15 is a protein that in humans is encoded by the ''EPS15'' gene In biology, the word gene has two meanings. The Mendelian gene is a basic unit of heredity. The molecular gene is a sequence of nucle ...

, *

Epidermal growth factor receptor The epidermal growth factor receptor (EGFR; ErbB-1; HER1 in humans) is a transmembrane protein that is a receptor (biochemistry), receptor for members of the epidermal growth factor family (EGF family) of extracellular protein ligand (biochemistry ...

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Grb2 Growth factor receptor-bound protein 2, also known as Grb2, is an adaptor protein involved in signal transduction/ cell communication. In humans, the GRB2 protein is encoded by the ''GRB2'' gene. The protein encoded by this gene binds recepto ...

, *

IRS4 Insulin receptor substrate 4 is a protein that in humans is encoded by the ''IRS4'' gene In biology, the word gene has two meanings. The Mendelian gene is a basic unit of heredity. The molecular gene is a sequence of nucleotides in DNA tha ...

, *

MAP4K1 Mitogen-activated protein kinase kinase kinase kinase 1 is a protein kinase that in humans is encoded by the ''MAP4K1'' gene. It is also known as HPK1 (Hematopoietic Progenitor Kinase 1). The protein has been shown to play a role in JNK activati ...

, *

MAPK8 Mitogen-activated protein kinase 8 (also known as JNK1) is a ubiquitous enzyme that in humans is encoded by the ''MAPK8'' gene. Function The protein encoded by this gene is a member of the MAP kinase and JNK family. MAP kinases act as an int ...

, *

NEDD9 Neural precursor cell expressed developmentally down-regulated protein 9 (NEDD-9) is a protein that in humans is encoded by the ''NEDD9'' gene. NEDD-9 is also known as enhancer of filamentation 1 (EF1), CRK-associated substrate-related protein (CA ...

, *

PDGFRA Platelet-derived growth factor receptor A, also termed CD140a, is a Receptor (biochemistry), receptor located on the surface of a wide range of cell types. The protein is encoded in the human by the ''PDGFRA'' gene. This receptor binds to certain ...

, *

PDGFRB Platelet-derived growth factor receptor beta is a protein that in humans is encoded by the ''PDGFRB'' gene. Mutations in PDGFRB are mainly associated with the clonal eosinophilia class of malignancies. Gene The ''PDGFRB'' gene is located on h ...

, *

PTK2 PTK2 protein tyrosine kinase 2 (PTK2), also known as focal adhesion kinase (FAK), is a protein that, in humans, is encoded by the ''PTK2'' gene. PTK2 is a focal adhesion-associated protein kinase involved in cellular adhesion (how cells stick to ...

, *

Paxillin Paxillin is a protein that in humans is encoded by the ''PXN'' gene. Paxillin is expressed at focal adhesions of non-striated cells and at costameres of striated muscle cells, and it functions to adhere cells to the extracellular matrix. Mutati ...

RAPGEF1 Rap guanine nucleotide exchange factor 1 is a protein that in humans is encoded by the ''RAPGEF1'' gene. Function The protein encoded by this gene is a human guanine nucleotide releasing protein for Ras protein. It belongs to the adaptor-type ...

, *

RICS The Royal Institution of Chartered Surveyors (RICS) is a global professional body for those working in the Built Environment, Construction, Land, Property and Real Estate. The RICS was founded in London in 1868. It works at a cross-governmental ...

, *

SH3KBP1 SH3 domain-containing kinase-binding protein 1 (synonyms - CIN85, in rodents - Ruk) is an adaptor protein that in humans is encoded by the ''SH3KBP1'' gene. Function CBL (MIM 165360) constitutively interacts with SH3 domain-containing prote ...

, and *

SOS1 Son of sevenless homolog 1 is a protein that in humans is encoded by the ''SOS1'' gene. Function SOS1 is a guanine nucleotide exchange factor (GEF) which interacts with Ras protein, Ras proteins to phosphorylate GDP into GTP, or from an inacti ...

References

External links

Crk
Info with links in th
Cell Migration Gateway
* * * {{UCSC gene info, CRK Genes Human proteins

Function

Interactions

See also

References

Further reading

External links