ID:RNC_HUMAN DESCRIPTION: RecName: Full=Ribonuclease 3; EC=3.1.26.3; AltName: Full=Protein Drosha; AltName: Full=Ribonuclease III; Short=RNase III; AltName: Full=p241; FUNCTION: Ribonuclease III double-stranded (ds) RNA-specific endoribonuclease that is involved in the initial step of microRNA (miRNA) biogenesis. Component of the microprocessor complex that is required to process primary miRNA transcripts (pri-miRNAs) to release precursor miRNA (pre-miRNA) in the nucleus. Within the microprocessor complex, DROSHA cleaves the 3' and 5' strands of a stem-loop in pri-miRNAs (processing center 11 bp from the dsRNA- ssRNA junction) to release hairpin-shaped pre-miRNAs that are subsequently cut by the cytoplasmic DICER to generate mature miRNAs. Involved also in pre-rRNA processing. Cleaves double- strand RNA and does not cleave single-strand RNA. Involved in the formation of GW bodies. CATALYTIC ACTIVITY: Endonucleolytic cleavage to 5'- phosphomonoester. COFACTOR: Magnesium or manganese (By similarity). SUBUNIT: Component of the microprocessor complex, or pri-miRNA processing protein complex, which is composed of DROSHA and DGCR8. The microprocessor complex may contain multiple subunit of DGCR8 and DROSHA. Interacts with DGCR8, SP1 and SNIP1. Interacts with SRRT/ARS2. INTERACTION: Q8WYQ5:DGCR8; NbExp=4; IntAct=EBI-528367, EBI-528411; SUBCELLULAR LOCATION: Nucleus. Nucleus, nucleolus. Note=A fraction is translocated to the nucleolus during the S phase of the cell cycle. Localized in GW bodies (GWBs), also known as P-bodies. TISSUE SPECIFICITY: Ubiquitous. DOMAIN: The 2 RNase III domains form an intramolecular dimer where the domain 1 cuts the 3'strand while the domain 2 cleaves the 5'strand of pri-miRNAs, independently of each other. SIMILARITY: Contains 1 DRBM (double-stranded RNA-binding) domain. SIMILARITY: Contains 2 RNase III domains. SEQUENCE CAUTION: Sequence=AAD29637.1; Type=Frameshift; Positions=775; Sequence=BAA91511.1; Type=Erroneous initiation; Note=Translation N-terminally extended; WEB RESOURCE: Name=Protein Spotlight; Note=The dark side of RNA - Issue 87 of October 2007; URL="http://web.expasy.org/spotlight/back_issues/sptlt087.shtml";
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on Q9NRR4
Front
Top
Side
The pictures above may be empty if there is no ModBase structure for the protein. The ModBase structure frequently covers just a fragment of the protein. You may be asked to log onto ModBase the first time you click on the pictures. It is simplest after logging in to just click on the picture again to get to the specific info on that model.
Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
AF189011 - Homo sapiens ribonuclease III (RN3) mRNA, complete cds. BC024261 - Homo sapiens ribonuclease III, nuclear, mRNA (cDNA clone IMAGE:3631271). BC041162 - Homo sapiens ribonuclease type III, nuclear, mRNA (cDNA clone IMAGE:5114643), partial cds. BC054003 - Homo sapiens ribonuclease type III, nuclear, mRNA (cDNA clone MGC:61568 IMAGE:6148714), complete cds. BX647724 - Homo sapiens mRNA; cDNA DKFZp686F16262 (from clone DKFZp686F16262). AF116910 - Homo sapiens clone HAW100 putative ribonuclease III mRNA, complete cds. AK001121 - Homo sapiens cDNA FLJ10259 fis, clone HEMBB1000947, highly similar to Homo sapiens clone HAW100 putative ribonuclease III mRNA. AK308093 - Homo sapiens cDNA, FLJ98041. AB209501 - Homo sapiens mRNA for nuclear RNase III Drosha variant protein. JD326879 - Sequence 307903 from Patent EP1572962. AK026563 - Homo sapiens cDNA: FLJ22910 fis, clone KAT05748, highly similar to AF116910 Homo sapiens clone HAW100 putative ribonuclease III mRNA. JD088094 - Sequence 69118 from Patent EP1572962. AJ242976 - Homo sapiens partial mRNA for putative protein p241 which interacts with transcription factor Sp1. JD326376 - Sequence 307400 from Patent EP1572962. JD385685 - Sequence 366709 from Patent EP1572962. JD538283 - Sequence 519307 from Patent EP1572962.
Biochemical and Signaling Pathways
Reactome (by CSHL, EBI, and GO)
Protein Q9NRR4 (Reactome details) participates in the following event(s):