Protein: RNA-binding protein 7 (RNA-binding motif protein 7) (Q9Y580)
Organism: Homo sapiens (Human)
Function: RNA-binding subunit of the trimeric nuclear exosome targeting (NEXT) complex, a complex that functions as an RNA exosome cofactor that directs a subset of non-coding short-lived RNAs for exosomal degradation. NEXT is involved in surveillance and turnover of aberrant transcripts and non-coding RNAs. Binds preferentially polyuridine sequences and associates with newly synthesized RNAs, including pre-mRNAs and short-lived exosome substrates such as promoter upstream transcripts (PROMPTs), enhancer RNAs (eRNAs), and 3'-extended products from small nuclear RNAs (snRNAs). Participates in several biological processes including DNA damage response (DDR) and stress response. During stress response, activation of the p38MAPK-MK2 pathway decreases RBM7-RNA-binding and subsequently the RNA exosome degradation activities, thereby modulating the turnover of non-coding transcriptome. Participates in DNA damage response (DDR), through its interaction with MEPCE and LARP7, the core subunits of 7SK snRNP complex, that release the positive transcription elongation factor b (P-TEFb) complex from the 7SK snRNP. In turn, activation of P-TEFb complex induces the transcription of P-TEFb-dependent DDR genes to promote cell viability.
Subcellular location: Nucleus, nucleoplasm {ECO:0000269|PubMed:21855801, ECO:0000269|PubMed:25852104}. Nucleus {ECO:0000250|UniProtKB:Q9CQT2}. Note=Excluded from the nucleolus. {ECO:0000269|PubMed:21855801}.
Sequence: MGAAAAEADRTLFVGNLETKVTEELLFELFHQAGPVIKVKIPKDKDGKPKQFAFVNFKHEVSVPYAMNLLNGIKLYGRPIKIQFRSGSSHAPQDVSLSYPQHHVGNSSPTSTSPSRYERTMDNMTSSAQIIQRSFSSPENFQRQAVMNSALRQMSYGGKFGSSPLDQSGFSPSVQSHSHSFNQSSSSQWRQGTPSSQRKVRMNSYPYLADRHYSREQRYTDHGSDHHYRGKRDDFFYEDRNHDDWSHDYDNRRDSSRDGKWRSSRH
InterPro domains: - IPR035979: RNA-binding domain superfamily (homologous_superfamily) [8-98]
- IPR012677: Nucleotide-binding alpha-beta plait domain superfamily (homologous_superfamily) [1-86]
- IPR052285: Nuclear exosome targeting complex subunit (family) [6-266]
- IPR034500: RBM7, RNA recognition motif (domain) [9-83]
- IPR000504: RNA recognition motif domain (domain) [10-87]
Interaction partners: - Exosome RNA helicase MTR4
- Zinc finger CCHC domain-containing protein 8
- Splicing factor 3B subunit 2
- Exosome complex component RRP40
- Exosome complex component RRP43
- Serrate RNA effector molecule homolog
- Exosome complex component 10
- Exosome complex component RRP42
- Nuclear nucleic acid-binding protein C1D
- Splicing factor 1
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0044237 (cellular metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0071840 (cellular component organization or biogenesis), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:0044085 (cellular component biogenesis), GO:0006139 (nucleobase-containing compound metabolic process), GO:0046483 (heterocycle metabolic process), GO:0016043 (cellular component organization), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:0043170 (macromolecule metabolic process), GO:0090304 (nucleic acid metabolic process), GO:0022613 (ribonucleoprotein complex biogenesis), GO:0043933 (protein-containing complex organization), GO:0010467 (gene expression), GO:0022607 (cellular component assembly), GO:0016070 (RNA metabolic process), GO:0022618 (ribonucleoprotein complex assembly), GO:0065003 (protein-containing complex assembly), GO:0006396 (RNA processing), GO:0071826 (ribonucleoprotein complex subunit organization), GO:0008380 (RNA splicing), GO:0000245 (spliceosomal complex assembly), GO:0006397 (mRNA processing), GO:0016071 (mRNA metabolic process), GO:0000398 (mRNA splicing, via spliceosome), GO:0000375 (RNA splicing, via transesterification reactions), GO:0000377 (RNA splicing, via transesterification reactions with bulged adenosine as nucleophile)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043229 (intracellular organelle), GO:0043233 (organelle lumen), GO:0043227 (membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0031981 (nuclear lumen), GO:0005634 (nucleus)