Q7T086 · Q7T086_STEHI
- ProteinV(D)J recombination-activating protein 1
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids310 (go to sequence)
- Protein existenceInferred from homology
- Annotation score4/5
Function
function
Catalytic component of the RAG complex, a multiprotein complex that mediates the DNA cleavage phase during V(D)J recombination. V(D)J recombination assembles a diverse repertoire of immunoglobulin and T-cell receptor genes in developing B and T-lymphocytes through rearrangement of different V (variable), in some cases D (diversity), and J (joining) gene segments. In the RAG complex, RAG1 mediates the DNA-binding to the conserved recombination signal sequences (RSS) and catalyzes the DNA cleavage activities by introducing a double-strand break between the RSS and the adjacent coding segment. RAG2 is not a catalytic component but is required for all known catalytic activities. DNA cleavage occurs in 2 steps: a first nick is introduced in the top strand immediately upstream of the heptamer, generating a 3'-hydroxyl group that can attack the phosphodiester bond on the opposite strand in a direct transesterification reaction, thereby creating 4 DNA ends: 2 hairpin coding ends and 2 blunt, 5'-phosphorylated ends.
Catalytic activity
Cofactor
Protein has several cofactor binding sites:
Note: Binds 1 divalent metal cation per subunit. Mg2+ or Mn2+.
Features
Showing features for dna binding.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
DNA binding | 39-106 | NBD | ||||
Sequence: GGRPRQHLLSLTRRAQKHRLRELKRQVKAFAEKEEGGDIKAVCMTLFLLALRAKNEHRQADELEAIMQ |
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | DNA recombinase complex | |
Cellular Component | endodeoxyribonuclease complex | |
Cellular Component | nucleus | |
Molecular Function | double-stranded DNA endonuclease activity | |
Molecular Function | histone binding | |
Molecular Function | protein homodimerization activity | |
Molecular Function | sequence-specific DNA binding | |
Molecular Function | ubiquitin protein ligase activity | |
Molecular Function | zinc ion binding | |
Biological Process | adaptive immune response | |
Biological Process | chromatin organization | |
Biological Process | pre-B cell allelic exclusion | |
Biological Process | T cell differentiation in thymus | |
Biological Process | V(D)J recombination |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameV(D)J recombination-activating protein 1
- EC number
Organism names
- Organism
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Archelosauria > Archosauria > Dinosauria > Saurischia > Theropoda > Coelurosauria > Aves > Neognathae > Charadriiformes > Laridae > Sterna
Accessions
- Primary accessionQ7T086
Subcellular Location
Interaction
Subunit
Homodimer.
Structure
Family & Domains
Features
Showing features for domain, compositional bias, region.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Domain | 1-28 | RAG1-type | ||||
Sequence: IRCPVKECDEEILHGKYGQHLSSHKEMK | ||||||
Compositional bias | 19-38 | Basic and acidic residues | ||||
Sequence: QHLSSHKEMKDREPYSHINK | ||||||
Region | 19-41 | Disordered | ||||
Sequence: QHLSSHKEMKDREPYSHINKGGR | ||||||
Domain | 39-106 | NBD | ||||
Sequence: GGRPRQHLLSLTRRAQKHRLRELKRQVKAFAEKEEGGDIKAVCMTLFLLALRAKNEHRQADELEAIMQ |
Domain
The NBD (nonamer binding) DNA-binding domain mediates the specific binding to the nonamer RSS motif by forming a tightly interwoven homodimer that binds and synapses 2 nonamer elements, with each NBD making contact with both DNA molecules. Each RSS is composed of well-conserved heptamer (consensus 5'-CACAGTG-3') and nonamer (consensus 5'-ACAAAAACC-3') sequences separated by a spacer of either 12 bp or 23 bp.
Sequence similarities
Belongs to the RAG1 family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusFragment
- Length310
- Mass (Da)34,740
- Last updated2003-10-01 v1
- Checksum03C450FB032A6D1F
Features
Showing features for non-terminal residue, compositional bias.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Non-terminal residue | 1 | |||||
Sequence: I | ||||||
Compositional bias | 19-38 | Basic and acidic residues | ||||
Sequence: QHLSSHKEMKDREPYSHINK | ||||||
Non-terminal residue | 310 | |||||
Sequence: A |