RNPC3
RNA-binding region-containing protein 3
Also known as: FLJ20008, KIAA1839, RBM40, RNPC3_HUMAN, SNRNP65
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q96LT9
- Gene
- RNPC3
- Ensembl
- ENSG00000185946
- Chromosome
- 1
- Canonical length
- 517 aa
- Protein class
- Disease related genes, Human disease related genes, Predicted intracellular proteins
- Subcellular location
- Nucleoplasm
OverviewNCBI Gene
Two types of spliceosomes catalyze splicing of pre-mRNAs. The major U2-type spliceosome is found in all eukaryotes and removes U2-type introns, which represent more than 99% of pre-mRNA introns. The minor U12-type spliceosome is found in some eukaryotes and removes U12-type introns, which are rare and have distinct splice consensus signals. The U12-type spliceosome consists of several small nuclear RNAs and associated proteins. This gene encodes a 65K protein that is a component of the U12-type spliceosome. This protein contains two RNA recognition motifs (RRMs), suggesting that it may contact one of the small nuclear RNAs of the minor spliceosome. [provided by RefSeq, Jul 2008]
Canonical amino-acid sequenceUniProt
517 residues, UniProt reviewed canonical sequence.
>Q96LT9|RNPC3
1 MAAPEQPLAI SRGCTSSSSL SPPRGDRTLL VRHLPAELTA EEKEDLLKYF GAQSVRVLSD
61 KGRLKHTAFA TFPNEKAAIK ALTRLHQLKL LGHTLVVEFA KEQDRVHSPC PTSGSEKKKR
121 SDDPVEDDKE KKELGYLTVE NGIAPNHGLT FPLNSCLKYM YPPPSSTILA NIVNALASVP
181 KFYVQVLHLM NKMNLPTPFG PITARPPMYE DYMPLHAPLP PTSPQPPEEP PLPDEDEELS
241 SEESEYESTD DEDRQRMNKL MELANLQPKR PKTIKQRHVR KKRKIKDMLN TPLCPSHSSL
301 HPVLLPSDVF DQPQPVGNKR IEFHISTDMP AAFKKDLEKE QNCEEKNHDL PATEVDASNI
361 GFGKIFPKPN LDITEEIKED SDEMPSECIS RRELEKGRIS REEMETLSVF RSYEPGEPNC
421 RIYVKNLAKH VQEKDLKYIF GRYVDFSSET QRIMFDIRLM KEGRMKGQAF IGLPNEKAAA
481 KALKEANGYV LFGKPMVVQF ARSARPKQDP KEGKRKCLocalizationUniProt · AlphaFold · HPA
Whether an antibody against RNPC3 can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Intracellular
- Secreted
- No
- Transmembrane segments
- 0
- Mean surface accessibility (rSASA)
- 0.53
- Highest tissue expression
- 59 nTPM
Expression across tissuesHPA
Tissue
- retina: 59 nTPM
- thyroid gland: 52 nTPM
- epididymis: 51 nTPM
- cerebellum: 44 nTPM
- skeletal muscle: 41 nTPM
- pancreas: 41 nTPM
Single-cell type
- distal convoluted tubule cells: 624 nCPM
- myonuclei: 354 nCPM
- astrocytes: 242 nCPM
- pituitary stem cells: 217 nCPM
- brain inhibitory neurons: 198 nCPM
- adrenal cortex cells: 195 nCPM
Immune cell
- neutrophil: 254 nTPM
- basophil: 251 nTPM
- naive B-cell: 128 nTPM
- plasmacytoid DC: 112 nTPM
- memory B-cell: 110 nTPM
- classical monocyte: 91 nTPM
Brain region
- cerebral cortex: 111 nTPM
- white matter: 108 nTPM
- cerebellum: 107 nTPM
- basal ganglia: 82 nTPM
- amygdala: 82 nTPM
- hippocampal formation: 75 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about RNPC3.
Disease | AllUniProt
Conditions RNPC3 is implicated in, by any mechanism.
- Pituitary hormone deficiency, combined or isolated, 7 (CPHD7) MIM:618160
Disease | GeneticClinVar
11 pathogenic / likely-pathogenic of 102 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Isolated growth hormone deficiency, type 5
- Decreased response to growth hormone stimulation test
Disease | AutoantibodyPubMed
Conditions in which antibodies against RNPC3 are reported. Each links to that disease's full target list.
ReferencesPubMed · IEDB
Publications for RNPC3 from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.
Reference: AutoantibodyPubMed
4 publications
- Anti-RNPC-3 (U11/U12) Antibodies in Systemic Sclerosis in Patients With Moderate-to-Severe Gastrointestinal Dysmotility.
2019 · Arthritis Care Res (Hoboken) · RCR 2.8 · 48 citations - Brief Report: Anti-RNPC-3 Antibodies As a Marker of Cancer-Associated Scleroderma.
2017 · Arthritis Rheumatol · RCR 2.5 · 59 citations - Anti-RNPC-3 antibody predicts poor prognosis in patients with interstitial lung disease associated to systemic sclerosis.
2021 · Rheumatology (Oxford) · RCR 1.7 · 21 citations - Clinical Associations of Anti-RNPC3 Autoantibodies in Mixed Connective Tissue Disease.
2026 · ACR Open Rheumatol
Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.74
- gnomAD pLI
- 0
- gnomAD missense Z
- 0.99
- DepMap mean gene effect
- -1.61
- DepMap dependency class
- pan
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of RNPC3 in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads RNPC3 as an antibody target. Whether an autoantibody or antibody against RNPC3 could matter depends on whether native RNPC3 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
RNPC3 is annotated as predominantly intracellular. Intracellular proteins are common autoantibody markers, becoming visible to the immune system after cell injury or altered processing, but are usually markers of disease rather than direct drivers.
Annotation status
The present source text does not explicitly label RNPC3 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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