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Sep. 10, 2014:
A total of 174 experimentally verified S-nitrosylation sites on 94 S-nitrosylated proteins from individualized human colorectal cancer tissues using a label-free quantitation strategy.

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Protein Name: U3 small nucleolar RNA-associated protein 4 homolog

UniprotKB/SwissProt ID: Q969X6 (Q969X6)

Gene Name: UTP4

Organism: Homo sapiens (Human)

Function: Ribosome biogenesis factor. Involved in nucleolar processing of pre-18S ribosomal RNA. 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 d Involved in SSU pre-rRNA processing at sites A', A0, 1 and 2b. Required for optimal pre-ribosomal RNA transcription by RNA polymerase (PubMed:17699751, PubMed:19732766, PubMed:34516797). May be a transcriptional regulator (PubMed:22916032) (Microbial infection) Acts as a positive regulator of HIVEP1 which specifically binds to the DNA sequence 5'-GGGACTTTCC-3' found in enhancer elements of numerous viral promoters such as those of HIV-1, SV40, or CMV

Other Modifications: View all modification sites in dbPTM

Protein Subcellular Localization: Nucleus, nucleolus. Chromosome

Graphical Visualization of S-nitrosylation Sites:
InterPro ID Domain Name
IPR046351 UTP4
IPR015943 WD40/YVTN_repeat-like_dom_sf
IPR036322 WD40_repeat_dom_sf
IPR001680 WD40_rpt

The S-nitrosylation sites of Q969X6

No. Position S-nitrosylated Peptide Secondary Structure of S-nitrosylated Peptide Solvent Accessibility of nitrosylated Site PubMed ID
1 340 ITFPHRCLIS C SKKRQLLLFQ