rs1554451207

Variant names:

• chr7-92079712-G-A
• rs1554451207
• NM_005751.5:c.7579G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_005751.5(AKAP9):​c.7579G>A​(p.Glu2527Lys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: AKAP9 NM_005751.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.51
• Publications: 0 publications found

Genes affected

AKAP9 (HGNC:379): (A-kinase anchoring protein 9) The A-kinase anchor proteins (AKAPs) are a group of structurally diverse proteins which have the common function of binding to the regulatory subunit of protein kinase A (PKA) and confining the holoenzyme to discrete locations within the cell. This gene encodes a member of the AKAP family. Alternate splicing of this gene results in at least two isoforms that localize to the centrosome and the Golgi apparatus, and interact with numerous signaling proteins from multiple signal transduction pathways. These signaling proteins include type II protein kinase A, serine/threonine kinase protein kinase N, protein phosphatase 1, protein phosphatase 2a, protein kinase C-epsilon and phosphodiesterase 4D3. [provided by RefSeq, Aug 2008]

AKAP9 Gene-Disease associations (from GenCC):

• male infertility with azoospermia or oligozoospermia due to single gene mutation

  Inheritance: AR Classification: MODERATE Submitted by: King Faisal Specialist Hospital and Research Center
• long QT syndrome 11

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
• long QT syndrome

  Inheritance: AD Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3442716).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AKAP9	NM_005751.5	c.7579G>A	p.Glu2527Lys	missense_variant	Exon 31 of 50	ENST00000356239.8	NP_005742.4
AKAP9	NM_147185.3	c.7555G>A	p.Glu2519Lys	missense_variant	Exon 31 of 50		NP_671714.1
AKAP9	NM_001379277.1	c.2224G>A	p.Glu742Lys	missense_variant	Exon 10 of 29		NP_001366206.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AKAP9	ENST00000356239.8	c.7579G>A	p.Glu2527Lys	missense_variant	Exon 31 of 50	1	NM_005751.5	ENSP00000348573.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Long QT syndrome Uncertain:1

May 18, 2017

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid with lysine at codon 2527 of the AKAP9 protein (p.Glu2527Lys). The glutamic acid residue is highly conserved and there is a small physicochemical difference between glutamic acid and lysine. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a AKAP9-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.084
BayesDel_addAF	Benign	-0.081	T
BayesDel_noAF	Benign	-0.35
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.39	.;T;T;.
Eigen	Uncertain	0.47
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.87	D;D;D;D
M_CAP	Benign	0.037	D
MetaRNN	Benign	0.34	T;T;T;T
MetaSVM	Benign	-1.1	T
PhyloP100		4.5
PrimateAI	Benign	0.46	T
PROVEAN	Benign	-2.2	N;.;.;N
REVEL	Benign	0.18
Sift	Uncertain	0.0020	D;.;.;D
Sift4G	Benign	0.11	.;T;.;D
Vest4		0.26
MVP		0.51
MPC		0.21
ClinPred		0.91	D
GERP RS		4.7
Varity_R		0.24
gMVP		0.43
Mutation Taster		=43/57	disease causing

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

Other links and lift over

dbSNP: rs1554451207; hg19: chr7-91709026;