chr12-54497791-T-C

Position:

• chr12-54497791-T-C

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_005337.5(NCKAP1L):​c.2T>C​(p.Met1?) variant causes a start lost change. The variant allele was found at a frequency of 0.000000688 in 1,454,358 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: NCKAP1L NM_005337.5 start_lost
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 3.66

Genes affected

NCKAP1L (HGNC:4862): (NCK associated protein 1 like) This gene encodes a member of the HEM family of tissue-specific transmembrane proteins which are highly conserved from invertebrates through mammals. This gene is only expressed in hematopoietic cells. The encoded protein is a part of the Scar/WAVE complex which plays an important role in regulating cell shape in both metazoans and plants. Alternatively spliced transcript variants encoding different isoforms have been found.[provided by RefSeq, May 2010]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 12-54497791-T-C is Pathogenic according to our data. Variant chr12-54497791-T-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2585458.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
NCKAP1L	NM_005337.5	c.2T>C	p.Met1?	start_lost	1/31	ENST00000293373.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
NCKAP1L	ENST00000293373.11	c.2T>C	p.Met1?	start_lost	1/31	1	NM_005337.5	P1
NCKAP1L	ENST00000547500.1	n.26T>C		non_coding_transcript_exon_variant	1/3	2
NCKAP1L	ENST00000548221.5	c.2T>C	p.Met1?	start_lost, NMD_transcript_variant	1/31	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1454358 Hom.: 0 Cov.: 28 AF XY: 0.00 AC XY: 0 AN XY: 724082

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.05e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Immunodeficiency 72 with autoinflammation Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Neuberg Centre For Genomic Medicine, NCGM

-

The start loss variant c.2T>C (p.Met1?) in NCKAP1L gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The variant is novel (not in any individuals) in gnomAD Exomes and 1000 Genomes. The variant is predicted to be damaging by both SIFT and PolyPhen2. The residue is conserved across species. The nucleotide change in NCKAP1L is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. This variant is predicted to cause loss of normal protein function through protein truncation. Loss of function variants have been previously reported to be disease causing. For these reasons, this variant has been classified as Likely Pathogenic . -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.21	D
BayesDel_noAF	Uncertain	0.070
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.28	T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.30	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Benign	-0.95	T
MutationTaster	Benign	1.0	D
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.32
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.012	D
Polyphen		0.72	P
Vest4		0.84
MutPred		1.0		Loss of stability (P = 0.0251);
MVP		0.30
ClinPred		0.99	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.79
gMVP		0.56

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-54891575;