rs61630004

Positions:

• chr12-52367173-C-A
• chr12-52367173-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_002283.4(KRT85):​c.233G>T​(p.Arg78Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R78H) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRT85 NM_002283.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.495

Genes affected

KRT85 (HGNC:6462): (keratin 85) The protein encoded by this gene is a member of the keratin gene family. As a type II hair keratin, it is a basic protein which heterodimerizes with type I keratins to form hair and nails. The type II hair keratins are clustered in a region of chromosome 12q13 and are grouped into two distinct subfamilies based on structure similarity. One subfamily, consisting of KRTHB1, KRTHB3, and KRTHB6, is highly related. The other less-related subfamily includes KRTHB2, KRTHB4, and KRTHB5. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.29066634).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRT85	NM_002283.4	c.233G>T	p.Arg78Leu	missense_variant	1/9	ENST00000257901.7	NP_002274.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRT85	ENST00000257901.7	c.233G>T	p.Arg78Leu	missense_variant	1/9	1	NM_002283.4	ENSP00000257901	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Benign	-0.097	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	21
DANN	Benign	0.86
DEOGEN2	Benign	0.087	T
Eigen	Benign	-0.44
Eigen_PC	Benign	-0.41
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.26	T
M_CAP	Benign	0.079	D
MetaRNN	Benign	0.29	T
MetaSVM	Benign	-0.83	T
MutationAssessor	Uncertain	2.1	M
MutationTaster	Benign	1.0	N
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-1.9	N
REVEL	Benign	0.26
Sift	Benign	0.69	T
Sift4G	Benign	0.69	T
Polyphen		0.62	P
Vest4		0.42
MutPred		0.53		Gain of catalytic residue at A73 (P = 2e-04);
MVP		0.80
MPC		1.2
ClinPred		0.41	T
GERP RS		3.3
Varity_R		0.14
gMVP		0.76

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs61630004; hg19: chr12-52760957;