chr7-117381034-T-C

Variant names:

• chr7-117381034-T-C
• NM_130768.3:c.922A>G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_130768.3(ASZ1):​c.922A>G​(p.Met308Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ASZ1 NM_130768.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.48

Genes affected

ASZ1 (HGNC:1350): (ankyrin repeat, SAM and basic leucine zipper domain containing 1) Predicted to be involved in gamete generation and piRNA metabolic process. Predicted to be located in cytoplasm. Predicted to be active in pi-body. [provided by Alliance of Genome Resources, Apr 2022]

CFTR (HGNC:1884): (CF transmembrane conductance regulator) This gene encodes a member of the ATP-binding cassette (ABC) transporter superfamily. The encoded protein functions as a chloride channel, making it unique among members of this protein family, and controls ion and water secretion and absorption in epithelial tissues. Channel activation is mediated by cycles of regulatory domain phosphorylation, ATP-binding by the nucleotide-binding domains, and ATP hydrolysis. Mutations in this gene cause cystic fibrosis, the most common lethal genetic disorder in populations of Northern European descent. The most frequently occurring mutation in cystic fibrosis, DeltaF508, results in impaired folding and trafficking of the encoded protein. Multiple pseudogenes have been identified in the human genome. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ASZ1	NM_130768.3	c.922A>G	p.Met308Val	missense_variant	Exon 9 of 13	ENST00000284629.7	NP_570124.1
ASZ1	NM_001301821.2	c.922A>G	p.Met308Val	missense_variant	Exon 9 of 13		NP_001288750.1
ASZ1	NM_001301822.2	c.298A>G	p.Met100Val	missense_variant	Exon 8 of 12		NP_001288751.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ASZ1	ENST00000284629.7	c.922A>G	p.Met308Val	missense_variant	Exon 9 of 13	1	NM_130768.3	ENSP00000284629.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 01, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.922A>G (p.M308V) alteration is located in exon 9 (coding exon 9) of the ASZ1 gene. This alteration results from a A to G substitution at nucleotide position 922, causing the methionine (M) at amino acid position 308 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.065	T
BayesDel_noAF	Benign	-0.14
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.14	T
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.79	T
M_CAP	Benign	0.078	D
MetaRNN	Uncertain	0.57	D
MetaSVM	Uncertain	0.053	D
MutationAssessor	Uncertain	2.3	M
PrimateAI	Uncertain	0.49	T
PROVEAN	Benign	-2.0	N
REVEL	Uncertain	0.60
Sift	Uncertain	0.0050	D
Sift4G	Uncertain	0.014	D
Polyphen		0.87	P
Vest4		0.58
MutPred		0.51		Loss of disorder (P = 0.0815);
MVP		0.64
MPC		0.25
ClinPred		0.96	D
GERP RS		4.3
Varity_R		0.55
gMVP		0.39

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr7-117021088;