InnateDB Protein
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IDBP-258576.6
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Last Modified
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2014-10-13 [Report errors or provide feedback]
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Gene Symbol
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Rag2
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Protein Name
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recombination activating gene 2
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Synonyms
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Rag-2;
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Species
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Mus musculus
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Ensembl Protein
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ENSMUSP00000106858
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InnateDB Gene
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IDBG-193167 (Rag2)
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Protein Structure
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Function |
Core 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. DNA cleavage by the RAG complex 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. The chromatin structure plays an essential role in the V(D)J recombination reactions and the presence of histone H3 trimethylated at 'Lys-4' (H3K4me3) stimulates both the nicking and haipinning steps. The RAG complex also plays a role in pre-B cell allelic exclusion, a process leading to expression of a single immunoglobulin heavy chain allele to enforce clonality and monospecific recognition by the B- cell antigen receptor (BCR) expressed on individual B-lymphocytes. The introduction of DNA breaks by the RAG complex on one immunoglobulin allele induces ATM-dependent repositioning of the other allele to pericentromeric heterochromatin, preventing accessibility to the RAG complex and recombination of the second allele. In the RAG complex, RAG2 is not the catalytic component but is required for all known catalytic activities mediated by RAG1. It probably acts as a sensor of chromatin state that recruits the RAG complex to H3K4me3. {ECO:0000269PubMed:16111638, ECO:0000269PubMed:19448632, ECO:0000269PubMed:19524534, ECO:0000269PubMed:2360047, ECO:0000269PubMed:8521468, ECO:0000269PubMed:9094713}.
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Subcellular Localization |
Nucleus.
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Disease Associations |
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Tissue Specificity |
Maturing lymphoid cells.
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Comments |
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Number of Interactions
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This gene and/or its encoded proteins are associated with 14 experimentally validated interaction(s) in this database.
They are also associated with 6 interaction(s) predicted by orthology.
Experimentally validated |
Total |
14
[view]
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Protein-Protein |
6
[view]
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Protein-DNA |
7
[view]
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Protein-RNA |
0
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DNA-DNA |
1
[view]
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RNA-RNA |
0
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DNA-RNA |
0
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Predicted by orthology |
Total |
6 [view]
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Molecular Function |
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Biological Process |
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Cellular Component |
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PDB ID |
MGI:97849
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InterPro |
IPR004321
V-D-J recombination activating protein 2
IPR011011
Zinc finger, FYVE/PHD-type
IPR011043
Galactose oxidase/kelch, beta-propeller
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PFAM |
PF03089
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PRINTS |
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PIRSF |
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SMART |
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TIGRFAMs |
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Modification |
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SwissProt |
P21784
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PhosphoSite |
PhosphoSite-P21784
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TrEMBL |
Q99NM2
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UniProt Splice Variant |
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Entrez Gene |
19374
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UniGene |
Mm.4988
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RefSeq |
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MGI ID |
2V89
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MGI Symbol |
Rag2
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OMIM |
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CCDS |
CCDS16462
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HPRD |
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IMGT |
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EMBL |
AK040375
AK089075
AY011940
BC120548
BC125473
CH466519
M64796
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GenPept |
AAB82302
AAG38683
AAI20549
AAI25474
BAC30576
BAC40737
EDL27654
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