chr14-104773603-C-T

Position:

• chr14-104773603-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_001382430.1(AKT1):​c.703-23G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00154 in 1,594,704 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.00095 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0016 (3 hom.)
• Consequence: AKT1 NM_001382430.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -2.95

Genes affected

AKT1 (HGNC:391): (AKT serine/threonine kinase 1) This gene encodes one of the three members of the human AKT serine-threonine protein kinase family which are often referred to as protein kinase B alpha, beta, and gamma. These highly similar AKT proteins all have an N-terminal pleckstrin homology domain, a serine/threonine-specific kinase domain and a C-terminal regulatory domain. These proteins are phosphorylated by phosphoinositide 3-kinase (PI3K). AKT/PI3K forms a key component of many signalling pathways that involve the binding of membrane-bound ligands such as receptor tyrosine kinases, G-protein coupled receptors, and integrin-linked kinase. These AKT proteins therefore regulate a wide variety of cellular functions including cell proliferation, survival, metabolism, and angiogenesis in both normal and malignant cells. AKT proteins are recruited to the cell membrane by phosphatidylinositol 3,4,5-trisphosphate (PIP3) after phosphorylation of phosphatidylinositol 4,5-bisphosphate (PIP2) by PI3K. Subsequent phosphorylation of both threonine residue 308 and serine residue 473 is required for full activation of the AKT1 protein encoded by this gene. Phosphorylation of additional residues also occurs, for example, in response to insulin growth factor-1 and epidermal growth factor. Protein phosphatases act as negative regulators of AKT proteins by dephosphorylating AKT or PIP3. The PI3K/AKT signalling pathway is crucial for tumor cell survival. Survival factors can suppress apoptosis in a transcription-independent manner by activating AKT1 which then phosphorylates and inactivates components of the apoptotic machinery. AKT proteins also participate in the mammalian target of rapamycin (mTOR) signalling pathway which controls the assembly of the eukaryotic translation initiation factor 4F (eIF4E) complex and this pathway, in addition to responding to extracellular signals from growth factors and cytokines, is disregulated in many cancers. Mutations in this gene are associated with multiple types of cancer and excessive tissue growth including Proteus syndrome and Cowden syndrome 6, and breast, colorectal, and ovarian cancers. Multiple alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jul 2020]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000952 (145/152344) while in subpopulation NFE AF= 0.00169 (115/68020). AF 95% confidence interval is 0.00144. There are 0 homozygotes in gnomad4. There are 58 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 3 SM gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AKT1	NM_001382430.1	c.703-23G>A		intron_variant		ENST00000649815.2	NP_001369359.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AKT1	ENST00000649815.2	c.703-23G>A		intron_variant			NM_001382430.1	ENSP00000497822	P1

Frequencies

GnomAD3 genomes AF: 0.000953 AC: 145 AN: 152226 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000555

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000327

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00169

Gnomad OTH AF: 0.000957

GnomAD3 exomes AF: 0.000796 AC: 173 AN: 217370 Hom.: 0 AF XY: 0.000783 AC XY: 92 AN XY: 117514

Gnomad AFR exome AF: 0.000147

Gnomad AMR exome AF: 0.000459

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.000217

Gnomad NFE exome AF: 0.00151

Gnomad OTH exome AF: 0.00129

GnomAD4 exome AF: 0.00160 AC: 2303 AN: 1442360 Hom.: 3 Cov.: 34 AF XY: 0.00158 AC XY: 1132 AN XY: 715168

Gnomad4 AFR exome AF: 0.000330

Gnomad4 AMR exome AF: 0.000433

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000120

Gnomad4 FIN exome AF: 0.000175

Gnomad4 NFE exome AF: 0.00199

Gnomad4 OTH exome AF: 0.00109

GnomAD4 genome AF: 0.000952 AC: 145 AN: 152344 Hom.: 0 Cov.: 33 AF XY: 0.000778 AC XY: 58 AN XY: 74504

Gnomad4 AFR AF: 0.000553

Gnomad4 AMR AF: 0.000327

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00169

Gnomad4 OTH AF: 0.000947

Alfa AF: 0.000646 Hom.: 0

Bravo AF: 0.000933

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	0.48
DANN	Benign	0.90

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs3730329; hg19: chr14-105239940; COSMIC: COSV104666453; COSMIC: COSV104666453;