KRTAP9-9
Keratin-associated protein 9-9
Also known as: KAP9.5, KAP9.9, KRA99_HUMAN, KRTAP9-5
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q9BYP9
- Gene
- KRTAP9-9
- Ensembl
- ENSG00000198083
- Chromosome
- 17
- Canonical length
- 154 aa
- Protein class
- Predicted intracellular proteins
OverviewNCBI Gene
This protein is a member of the keratin-associated protein (KAP) family. The KAP proteins form a matrix of keratin intermediate filaments which contribute to the structure of hair fibers. KAP family members appear to have unique, family-specific amino- and carboxyl-terminal regions and are subdivided into three multi-gene families according to amino acid composition: the high sulfur, the ultrahigh sulfur, and the high tyrosine/glycine KAPs. This protein is a member of the ultrahigh sulfur KAP family and the gene is localized to a cluster of KAPs at 17q12-q21. Alternative haplotypes of this gene are represented in the GRCh38 reference genome assembly. [provided by RefSeq, Dec 2015]
Canonical amino-acid sequenceUniProt
154 residues, UniProt reviewed canonical sequence.
>Q9BYP9|KRTAP9-9
1 MTHCCSPCCQ PTCCRTTCCR TTCWKPTTVT TCSSTPCCQP SCCVSSCCQP CCRPACCQNT
61 CCRTTCCQPT CLSSCCGQTS CGSSCGQSSS CAPVYCRRTC YYPTTVCLPG CLNQSCGSSC
121 CQPCCRPACC ETTCCRTTCF QPTCVSSCCQ PSCCLocalizationUniProt · AlphaFold · HPA
Whether an antibody against KRTAP9-9 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)
- 0.61
- Highest tissue expression
- 23 nTPM
Expression across tissuesHPA
Tissue
- skin: 23 nTPM
- salivary gland: 0.2 nTPM
- adipose tissue: 0 nTPM
- adrenal gland: 0 nTPM
- amygdala: 0 nTPM
- appendix: 0 nTPM
Single-cell type
- adipocytes: 0 nCPM
- adrenal cortex cells: 0 nCPM
- adrenal medulla cells: 0 nCPM
- alveolar cells type 1: 0 nCPM
- alveolar cells type 2: 0 nCPM
- astrocytes: 0 nCPM
Immune cell
- basophil: 0 nTPM
- classical monocyte: 0 nTPM
- eosinophil: 0 nTPM
- gdT-cell: 0 nTPM
- intermediate monocyte: 0 nTPM
- MAIT T-cell: 0 nTPM
Brain region
- amygdala: 0 nTPM
- basal ganglia: 0 nTPM
- cerebellum: 0 nTPM
- cerebral cortex: 0 nTPM
- choroid plexus: 0 nTPM
- hippocampal formation: 0 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about KRTAP9-9.
Disease | GeneticClinVar
3 pathogenic / likely-pathogenic of 30 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
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)
- 1.89
- gnomAD pLI
- 0.29
- gnomAD missense Z
- -1.02
- DepMap mean gene effect
- -0.23
- DepMap dependency class
- selective
OntologyGO
Cellular components
Protein domainsUniProt · Pfam · InterPro
KeywordsUniProt
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads KRTAP9-9 as an antibody target. Whether an autoantibody or antibody against KRTAP9-9 could matter depends on whether native KRTAP9-9 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
KRTAP9-9 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 KRTAP9-9 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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