chr19-49873034-T-G

Variant names:

• chr19-49873034-T-G
• rs376054064
• NM_001098633.4:c.262A>C

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1 PM2 BP4_Moderate

The NM_001098633.4(AKT1S1):​c.262A>C​(p.Ser88Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000071 in 1,408,948 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 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. S88C) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: AKT1S1 NM_001098633.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.866
• Publications: 0 publications found

Genes affected

AKT1S1 (HGNC:28426): (AKT1 substrate 1) AKT1S1 is a proline-rich substrate of AKT (MIM 164730) that binds 14-3-3 protein (see YWHAH, MIM 113508) when phosphorylated (Kovacina et al., 2003 [PubMed 12524439]).[supplied by OMIM, Mar 2008]

PNKP (HGNC:9154): (polynucleotide kinase 3'-phosphatase) This locus represents a gene involved in DNA repair. In response to ionizing radiation or oxidative damage, the protein encoded by this locus catalyzes 5' phosphorylation and 3' dephosphorylation of nucleic acids. Mutations at this locus have been associated with microcephaly, seizures, and developmental delay.[provided by RefSeq, Sep 2010]

PNKP Gene-Disease associations (from GenCC):

• ataxia - oculomotor apraxia type 4

  Inheritance: AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P, Laboratory for Molecular Medicine
• microcephaly, seizures, and developmental delay

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Charcot-Marie-Tooth disease type 2B2

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae)
• genetic developmental and epileptic encephalopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM1: In a modified_residue Phosphoserine (size 0) in uniprot entity AKTS1_HUMAN
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2085773).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AKT1S1	NM_001098633.4	c.262A>C	p.Ser88Arg	missense_variant	Exon 2 of 5	ENST00000344175.10	NP_001092103.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AKT1S1	ENST00000344175.10	c.262A>C	p.Ser88Arg	missense_variant	Exon 2 of 5	3	NM_001098633.4	ENSP00000341698.5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000605 AC: 1 AN: 165368 AF XY: 0.0000114

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000388

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: 7.10e-7 AC: 1 AN: 1408948 Hom.: 0 Cov.: 34 AF XY: 0.00000144 AC XY: 1 AN XY: 696192

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 32102

American (AMR) AF: 0.0000270 AC: 1 AN: 37028

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25172

East Asian (EAS) AF: 0.00 AC: 0 AN: 36616

South Asian (SAS) AF: 0.00 AC: 0 AN: 79970

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48476

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5504

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1085658

Other (OTH) AF: 0.00 AC: 0 AN: 58422

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.0000171 AC: 2

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.27
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	16
DANN	Uncertain	1.0
DEOGEN2	Benign	0.26	T;T;T;T;T;.;.
Eigen	Benign	-0.45
Eigen_PC	Benign	-0.44
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.73	T;.;.;.;.;T;T
M_CAP	Uncertain	0.12	D
MetaRNN	Benign	0.21	T;T;T;T;T;T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	0.90	L;L;L;L;L;.;.
PhyloP100		0.87
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-1.1	N;N;N;N;N;N;N
REVEL	Benign	0.063
Sift	Uncertain	0.023	D;D;D;D;D;D;D
Sift4G	Benign	0.24	T;T;T;T;T;T;.
Polyphen		0.68	P;P;P;P;P;.;.
Vest4		0.32
MutPred		0.29		Loss of glycosylation at S88 (P = 5e-04);Loss of glycosylation at S88 (P = 5e-04);Loss of glycosylation at S88 (P = 5e-04);Loss of glycosylation at S88 (P = 5e-04);Loss of glycosylation at S88 (P = 5e-04);.;Loss of glycosylation at S88 (P = 5e-04);
MVP		0.59
MPC		0.42
ClinPred		0.13	T
GERP RS		2.0
Varity_R		0.058
gMVP		0.19
Mutation Taster		=84/16	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs376054064; hg19: chr19-50376291;