Genetic Variant KRABD4:p.Cys126Arg (chrX-46472872-T-C) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_001129898.2(KRABD4):c.376T>C(p.Cys126Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000911 in 1,098,188 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 13/21 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. C126G) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 22)

Exomes 𝑓: 9.1e-7 ( 0 hom. 0 hem. )

Consequence

KRABD4
NM_001129898.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.951

Publications

0 publications found

Variant links:

Genes affected

KRABD4 (HGNC:26007): (KRAB box domain containing 4) This encodes a zinc finger protein with an N-terminal KRAB (Kruppel-associated) domain found in transcriptional repressors. This gene is located in a region of the X chromosome thought to be involved in nonsyndromic X-linked cognitive disability. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2011]

KRABD4 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.34268862).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001129898.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KRABD4	NM_001129898.2	MANE Select	c.376T>C	p.Cys126Arg	missense	Exon 6 of 6	NP_001123370.1	Q5JUW0-1
KRABD4	NM_017776.3		c.361T>C	p.Cys121Arg	missense	Exon 6 of 6	NP_060246.2	Q5JUW0-2
KRABD4	NM_001129899.2		c.*123T>C		3_prime_UTR	Exon 7 of 7	NP_001123371.1	Q5JUW0-3

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KRBOX4	ENST00000344302.9	TSL:2 MANE Select	c.376T>C	p.Cys126Arg	missense	Exon 6 of 6	ENSP00000345797.4	Q5JUW0-1
KRBOX4	ENST00000487081.1	TSL:1	c.*120T>C		3_prime_UTR	Exon 6 of 6	ENSP00000418076.1	Q5JUW0-3
KRBOX4	ENST00000942305.1		c.400T>C	p.Cys134Arg	missense	Exon 6 of 6	ENSP00000612364.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000546

AC:

AN:

183263

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000365

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

9.11e-7

AC:

AN:

1098188

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

363546

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26402

American (AMR)

AF:

0.0000284

AC:

AN:

35206

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19384

East Asian (EAS)

AF:

0.00

AC:

AN:

30199

South Asian (SAS)

AF:

0.00

AC:

AN:

54146

European-Finnish (FIN)

AF:

0.00

AC:

AN:

40532

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4137

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

842087

Other (OTH)

AF:

0.00

AC:

AN:

46095

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.68

CADD

Benign

5.5

(source)

DANN

Benign

0.93

DEOGEN2

Benign

0.17

FATHMM_MKL

Benign

0.036

LIST_S2

Benign

0.35

M_CAP

Benign

0.0015

MetaRNN

Benign

0.34

MetaSVM

Benign

-0.85

MutationAssessor

Uncertain

2.1

PhyloP100

0.95

PrimateAI

Benign

0.25

PROVEAN

Uncertain

-2.5

REVEL

Benign

0.13

Sift

Benign

0.24

Sift4G

Benign

0.32

Polyphen

0.69

Vest4

0.20

MutPred

0.78

Gain of disorder (P = 0.0093)

MVP

0.076

MPC

0.78

ClinPred

0.28

GERP RS

2.7

Varity_R

0.29

gMVP

0.080

Mutation Taster

=99/1

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over