KRTAP4-4

protein-coding

keratin associated protein 4-4, the group of Keratin associated proteins

Gene summary

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. [provided by RefSeq, Jul 2008]

Previous symbols:

KRTAP4-13

MANE transcript

NM_032524.2

Inheritance

—

ClinVar variants

U:32B:6

Top phenotype

—

gnomAD constraint

pLI —, LoF o/e 0

Max pathogenic AF

—

Genomic locus

chr17:41,159,649-41,160,748

External References & Databases

Ensembl (ENSG00000171396)

Transcript & Mutation Effects

hg38 • Region Span ~1.1 kb

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GenCC Phenotypes & Disease Associations

Curated gene-disease validity assertions and inheritance patterns

No GenCC data available for this gene.

ClinVar Associated Diseases & Phenotypes

Reported disease conditions connected to KRTAP4-4 variants in ClinVar

2 Conditions Cataloged

not specifiedTotal: 34

not providedTotal: 5

ClinVar Variants & Pathogenicity by Type

Statistics based on transcript NM_032524.2. Only rare variants are included.

We include only reliable ClinVar variants with their consequences to MANE Select, MANE Plus Clinical transcripts, or transcripts with TSL equal to 1. Click a count to filter the variants table below.

Slight differences between displayed counts and ClinVar may occur due to a different transcript/consequence chosen by our variant effect predictor, or because we classify Benign/Likely benign as Likely benign and Pathogenic/Likely pathogenic as Likely pathogenic.

Effect	PathogenicP	Likely pathogenicLP	VUS	Likely benignLB	BenignB	Sum
synonymous				4 clinvar		4
missense			32 clinvar	2 clinvar		34
nonsense						0
start loss						0
frameshift						0
splice donor/acceptor (+/-2bp)						0
Total	0	0	32	6	0	38

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Transcript Catalog

Annotated transcript isoforms across RefSeq and Ensembl databases

Showing 2 of 2 transcripts

Transcript ID	Source	Protein ID	Coding Exons	MANE Status
NM_032524.2	RefSeq	NP_115913.1	1	MANE Select
ENST00000390661.5	Ensembl	ENSP00000375076.3	1	MANE Select

Gene Ontology (GO) Annotations & Pathways

Biological processes, molecular functions, cellular components and pathways

Biological Process

keratinization
hair cycle

Cellular Component

cytosol
keratin filament

gnomAD Constraint

Source: gnomAD

Gene type: protein_coding
Transcript type: protein_coding
Transcript: ENST00000390661
Coding exons: 1
Length: 1074
Individuals with no LoFs: 0
Homozygous LoFs: 0
Heterozygous LoFs: 0
Defined: 0
p: 0.00

	Z-Score	Observed	Expected	Observed/Expected	Mutation Rate	Total Possible
Missense	-0.464	101	88.7	1.14	0.00000460	1085
Missense (PolyPhen)
Synonymous	-0.604	38	33.6	1.13	0.00000151	295
Loss of Function	0.571	0	0.380	0.00	1.56e-8	6

Population LoF Frequency

Population	CAF	p-value	Status
African	0	0.0	absent
Latino/Admixed American	0	0.0	absent
Ashkenazi Jewish	0	0.0	absent
East Asian	0	0.0	absent
Finnish	0	0.0	absent
European (Non-Finnish)	0	0.0	absent
South Asian	0	0.0	absent
Other	0	0.0	absent

dbNSFP Gene Annotations

Source: dbNSFP

Function: FUNCTION: In the hair cortex, hair keratin intermediate filaments are embedded in an interfilamentous matrix, consisting of hair keratin-associated proteins (KRTAP), which are essential for the formation of a rigid and resistant hair shaft through their extensive disulfide bond cross-linking with abundant cysteine residues of hair keratins. The matrix proteins include the high- sulfur and high-glycine-tyrosine keratins.;

Intolerance Scores

LoFtool: 0.646
RVIS EVS: 1.79
RVIS percentile EVS: 96.89

Essentials

Essential (CRISPR): N
Essential (CRISPR2): N
Essential (gene trap): N
Indispensability pred.: N
Indispensability score: 0.114

Gene Damage Prediction

	All	Recessive	Dominant
Mendelian	Medium	Medium	Medium
Primary Immunodeficiency	Medium	Medium	High
Cancer	Medium	Medium	Medium