7-2257487-C-T

Variant names:

• chr7-2257487-C-T
• rs1224972988
• NM_013321.4:c.1012G>A

Variant summary

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

The NM_013321.4(SNX8):​c.1012G>A​(p.Val338Met) variant causes a missense change. The variant allele was found at a frequency of 0.00000138 in 1,453,296 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. V338L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SNX8 NM_013321.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.79
• Publications: 0 publications found

Genes affected

SNX8 (HGNC:14972): (sorting nexin 8) Enables identical protein binding activity and phosphatidylinositol binding activity. Involved in early endosome to Golgi transport and intracellular protein transport. Located in early endosome membrane. Colocalizes with retromer complex. [provided by Alliance of Genome Resources, Apr 2022]

MIR6836 (HGNC:50067): (microRNA 6836) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

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=0.3170941).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_013321.4. 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
	SNX8	NM_013321.4	MANE Select	c.1012G>A	p.Val338Met	missense	Exon 9 of 11	NP_037453.1	Q9Y5X2
	MIR6836	NR_106895.1		n.*28G>A		downstream_gene	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SNX8	ENST00000222990.8	TSL:1 MANE Select	c.1012G>A	p.Val338Met	missense	Exon 9 of 11	ENSP00000222990.3	Q9Y5X2
	SNX8	ENST00000926983.1		c.1012G>A	p.Val338Met	missense	Exon 9 of 11	ENSP00000597042.1
	SNX8	ENST00000878404.1		c.1003G>A	p.Val335Met	missense	Exon 9 of 11	ENSP00000548463.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 0.00000138 AC: 2 AN: 1453296 Hom.: 0 Cov.: 35 AF XY: 0.00 AC XY: 0 AN XY: 722960

African (AFR) AF: 0.00 AC: 0 AN: 33302

American (AMR) AF: 0.00 AC: 0 AN: 43876

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25990

East Asian (EAS) AF: 0.00 AC: 0 AN: 39414

South Asian (SAS) AF: 0.0000234 AC: 2 AN: 85640

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49858

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5222

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1109912

Other (OTH) AF: 0.00 AC: 0 AN: 60082

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Benign	-0.062	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.027	T
Eigen	Uncertain	0.22
Eigen_PC	Benign	0.20
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.025	T
MetaRNN	Benign	0.32	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.4	M
PhyloP100		3.8
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-2.0	N
REVEL	Benign	0.072
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0030	D
Polyphen		0.87	P
Vest4		0.27
MVP		0.40
MPC		0.72
ClinPred		0.88	D
GERP RS		4.5
Varity_R		0.19
gMVP		0.36
Mutation Taster		=63/37	polymorphism

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: rs1224972988; hg19: chr7-2297122; COSMIC: COSV105840275; COSMIC: COSV105840275;