chr4-112377851-C-G

Position:

• chr4-112377851-C-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_025144.4(ALPK1):​c.74C>G​(p.Ala25Gly) 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. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ALPK1 NM_025144.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.57

Genes affected

ALPK1 (HGNC:20917): (alpha kinase 1) This gene encodes an alpha kinase. Mice which were homozygous for disrupted copies of this gene exhibited coordination defects (PMID: 21208416). Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.05023223).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ALPK1	NM_025144.4	c.74C>G	p.Ala25Gly	missense_variant	3/16	ENST00000650871.1	NP_079420.3
ALPK1	NM_001102406.2	c.74C>G	p.Ala25Gly	missense_variant	3/16		NP_001095876.1
ALPK1	NM_001253884.2	c.-6C>G		5_prime_UTR_variant	3/15		NP_001240813.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ALPK1	ENST00000650871.1	c.74C>G	p.Ala25Gly	missense_variant	3/16		NM_025144.4	ENSP00000498374	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 03, 2023

This sequence change replaces alanine, which is neutral and non-polar, with glycine, which is neutral and non-polar, at codon 25 of the ALPK1 protein (p.Ala25Gly). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with ALPK1-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The glycine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.092
BayesDel_addAF	Benign	-0.30	T
BayesDel_noAF	Benign	-0.67
CADD	Benign	9.5
DANN	Benign	0.67
DEOGEN2	Benign	0.0070	T;T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.10	N
LIST_S2	Benign	0.37	T;.
M_CAP	Benign	0.0043	T
MetaRNN	Benign	0.050	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L;L
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-0.40	N;N
REVEL	Benign	0.11
Sift	Benign	0.23	T;T
Sift4G	Uncertain	0.045	D;D
Polyphen		0.0010	B;B
Vest4		0.14
MutPred		0.16		Loss of stability (P = 0.054);Loss of stability (P = 0.054);
MVP		0.23
MPC		0.086
ClinPred		0.047	T
GERP RS		5.0
Varity_R		0.087

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: rs369223684; hg19: chr4-113299007;