Protein: RNA-binding protein PNO1 (Q9NRX1)
Organism: Homo sapiens (Human)
Function: Part of the small subunit (SSU) processome, first precursor of the small eukaryotic ribosomal subunit. During the assembly of the SSU processome in the nucleolus, many ribosome biogenesis factors, an RNA chaperone and ribosomal proteins associate with the nascent pre- rRNA and work in concert to generate RNA folding, modifications, rearrangements and cleavage as well as targeted degradation of pre- ribosomal RNA by the RNA exosome. Positively regulates dimethylation of two adjacent adenosines in the loop of a conserved hairpin near the 3'-end of 18S rRNA
Subcellular location: Nucleus, nucleolus
Sequence: MESEMETQSARAEEGFTQVTRKGGRRAKKRQAEQLSAAGEGGDAGRMDTEEARPAKRPVFPPLCGDGLLSGKEETRKIPVPANRYTPLKENWMKIFTPIVEHLGLQIRFNLKSRNVEIRTCKETKDVSALTKAADFVKAFILGFQVEDALALIRLDDLFLESFEITDVKPLKGDHLSRAIGRIAGKGGKTKFTIENVTRTRIVLADVKVHILGSFQNIKMARTAICNLILGNPPSKVYGNIRAVASRSADRF
InterPro domains: - IPR004087: K Homology domain (domain) [157-230]
- IPR055211: PNO1, second type I KH domain (domain) [154-249]
- IPR036612: K Homology domain, type 1 superfamily (homologous_superfamily) [73-251]
- IPR055212: PNO1, first type I KH domain (domain) [73-152]
Interaction partners: - RNA-binding protein NOB1
- Bystin
- Pre-rRNA-processing protein TSR1 homolog
- Protein LTV1 homolog
- Serine/threonine-protein kinase RIO2
- U3 small nucleolar RNA-associated protein 14 homolog A
- Small ribosomal subunit protein uS11
- Ribosome biogenesis protein BMS1 homolog
- Small ribosomal subunit protein uS4
- RNA 3'-terminal phosphate cyclase-like protein
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0097159 (organic cyclic compound binding), GO:1901363 (heterocyclic compound binding), GO:0005515 (protein binding), GO:0003676 (nucleic acid binding), GO:0003723 (RNA binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0071840 (cellular component organization or biogenesis), GO:0044237 (cellular metabolic process), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:0044085 (cellular component biogenesis), GO:0006139 (nucleobase-containing compound metabolic process), GO:0043170 (macromolecule metabolic process), GO:0046483 (heterocycle metabolic process), GO:0090304 (nucleic acid metabolic process), GO:0010467 (gene expression), GO:0022613 (ribonucleoprotein complex biogenesis), GO:0042254 (ribosome biogenesis), GO:0016070 (RNA metabolic process), GO:0006396 (RNA processing), GO:0034470 (ncRNA processing), GO:0006364 (rRNA processing), GO:0034660 (ncRNA metabolic process), GO:0016072 (rRNA metabolic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005622 (intracellular anatomical structure), GO:0043226 (organelle), GO:0005829 (cytosol), GO:0005737 (cytoplasm), GO:0031974 (membrane-enclosed lumen), GO:0005654 (nucleoplasm), GO:0043233 (organelle lumen), GO:0043229 (intracellular organelle), GO:0043227 (membrane-bounded organelle), GO:0043228 (non-membrane-bounded organelle), GO:0043231 (intracellular membrane-bounded organelle), GO:0070013 (intracellular organelle lumen), GO:0043232 (intracellular non-membrane-bounded organelle), GO:0031981 (nuclear lumen), GO:0005730 (nucleolus), GO:0005634 (nucleus)