rs2494751

Variant names:

• chr14-104796624-G-A
• rs2494751
• ENST00000855590.1:c.-80+3218C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The ENST00000855590.1(AKT1):​c.-80+3218C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.842 in 152,238 control chromosomes in the GnomAD database, including 55,124 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 0.84 (55124 hom., cov: 34)
• Consequence: AKT1 ENST00000855590.1 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.960
• Publications: 6 publications found

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]

AKT1 Gene-Disease associations (from GenCC):

• Proteus syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• Cowden disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Cowden syndrome 6

  Inheritance: Unknown, AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), ClinGen

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.72).
• BA1: GnomAd4 highest subpopulation (NFE) allele frequency at 95% confidence interval = 0.916 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000855590.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
There are no transcript annotations for this variant.

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AKT1	ENST00000855590.1		c.-80+3218C>T		intron	N/A	ENSP00000525649.1

Frequencies

GnomAD3 genomes AF: 0.842 AC: 128104 AN: 152120 Hom.: 55082 Cov.: 34

Gnomad AFR AF: 0.791

Gnomad AMI AF: 0.936

Gnomad AMR AF: 0.781

Gnomad ASJ AF: 0.880

Gnomad EAS AF: 0.334

Gnomad SAS AF: 0.657

Gnomad FIN AF: 0.928

Gnomad MID AF: 0.799

Gnomad NFE AF: 0.922

Gnomad OTH AF: 0.847

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.842 AC: 128212 AN: 152238 Hom.: 55124 Cov.: 34 AF XY: 0.836 AC XY: 62182 AN XY: 74424

African (AFR) AF: 0.791 AC: 32833 AN: 41492

American (AMR) AF: 0.781 AC: 11963 AN: 15312

Ashkenazi Jewish (ASJ) AF: 0.880 AC: 3055 AN: 3472

East Asian (EAS) AF: 0.335 AC: 1736 AN: 5180

South Asian (SAS) AF: 0.659 AC: 3178 AN: 4820

European-Finnish (FIN) AF: 0.928 AC: 9847 AN: 10614

Middle Eastern (MID) AF: 0.801 AC: 234 AN: 292

European-Non Finnish (NFE) AF: 0.922 AC: 62729 AN: 68032

Other (OTH) AF: 0.844 AC: 1783 AN: 2112

Alfa AF: 0.883 Hom.: 7596

Bravo AF: 0.830

Asia WGS AF: 0.513 AC: 1787 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.72
CADD	Benign	1.8
DANN	Benign	0.88
PhyloP100		-0.96

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs2494751;

hg19: chr14-105262961;