NARF
Nuclear prelamin A recognition factor
Also known as: DKFZp434G0420, FLJ10067, IOP2, NARF_HUMAN
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q9UHQ1
- Gene
- NARF
- Ensembl
- ENSG00000141562
- Chromosome
- 17
- Canonical length
- 456 aa
- Protein class
- Predicted intracellular proteins
- Subcellular location
- Nucleoplasm,Nucleoli
OverviewNCBI Gene
Several proteins have been found to be prenylated and methylated at their carboxyl-terminal ends. Prenylation was initially believed to be important only for membrane attachment. However, another role for prenylation appears to be its importance in protein-protein interactions. The only nuclear proteins known to be prenylated in mammalian cells are prelamin A- and B-type lamins. Prelamin A is farnesylated and carboxymethylated on the cysteine residue of a carboxyl-terminal CaaX motif. This post-translationally modified cysteine residue is removed from prelamin A when it is endoproteolytically processed into mature lamin A. The protein encoded by this gene binds to the prenylated prelamin A carboxyl-terminal tail domain. It may be a component of a prelamin A endoprotease complex. The encoded protein is located in the nucleus, where it partially colocalizes with the nuclear lamina. It shares limited sequence similarity with iron-only bacterial hydrogenases. Alternatively spliced transcript variants encoding different isoforms have been identified for this gene, including one with a novel exon that is generated by RNA editing. [provided by RefSeq, Jul 2008]
Canonical amino-acid sequenceUniProt
456 residues, UniProt reviewed canonical sequence.
>Q9UHQ1|NARF
1 MKCEHCTRKE CSKKTKTDDQ ENVSADAPSP AQENGEKGEF HKLADAKIFL SDCLACDSCM
61 TAEEGVQLSQ QNAKDFFRVL NLNKKCDTSK HKVLVVSVCP QSLPYFAAKF NLSVTDASRR
121 LCGFLKSLGV HYVFDTTIAA DFSILESQKE FVRRYRQHSE EERTLPMLTS ACPGWVRYAE
181 RVLGRPITAH LCTAKSPQQV MGSLVKDYFA RQQNLSPEKI FHVIVAPCYD KKLEALQESL
241 PPALHGSRGA DCVLTSGEIA QIMEQGDLSV RDAAVDTLFG DLKEDKVTRH DGASSDGHLA
301 HIFRHAAKEL FNEDVEEVTY RALRNKDFQE VTLEKNGEVV LRFAAAYGFR NIQNMILKLK
361 KGKFPFHFVE VLACAGGCLN GRGQAQTPDG HADKALLRQM EGIYADIPVR RPESSAHVQE
421 LYQEWLEGIN SPKAREVLHT TYQSQERGTH SLDIKWLocalizationUniProt · AlphaFold · HPA
Whether an antibody against NARF 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)
- 0.28
- Highest tissue expression
- 55 nTPM
Expression across tissuesHPA
Tissue
- testis: 55 nTPM
- skeletal muscle: 44 nTPM
- heart muscle: 35 nTPM
- bone marrow: 31 nTPM
- cerebellum: 27 nTPM
- spleen: 25 nTPM
Single-cell type
- late spermatids: 781 nCPM
- neutrophils: 207 nCPM
- early spermatids: 185 nCPM
- oocytes: 184 nCPM
- late primary spermatocytes: 183 nCPM
- erythrocyte progenitors: 182 nCPM
Immune cell
- neutrophil: 154 nTPM
- basophil: 96 nTPM
- eosinophil: 96 nTPM
- NK-cell: 53 nTPM
- T-reg: 44 nTPM
- naive B-cell: 40 nTPM
Brain region
- cerebral cortex: 33 nTPM
- cerebellum: 28 nTPM
- white matter: 26 nTPM
- basal ganglia: 25 nTPM
- pons: 25 nTPM
- amygdala: 24 nTPM
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)
- 1.29
- gnomAD pLI
- 0
- gnomAD missense Z
- -0.04
- DepMap mean gene effect
- -0.02
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 7% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Molecular functions
Cellular components
Protein domainsUniProt · Pfam · InterPro
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of NARF 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 NARF as an antibody target. Whether an autoantibody or antibody against NARF could matter depends on whether native NARF is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
NARF 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 NARF as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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