1-159928461-G-A

Variant names:

• chr1-159928461-G-A
• rs1242718842
• NM_001135050.2:c.2927C>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001135050.2(IGSF9):​c.2927C>T​(p.Ser976Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,230 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict 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. S976Y) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: IGSF9 NM_001135050.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.128
• Publications: 0 publications found

Genes affected

IGSF9 (HGNC:18132): (immunoglobulin superfamily member 9) Predicted to enable cell-cell adhesion mediator activity. Predicted to be involved in axon guidance; dendrite self-avoidance; and homophilic cell adhesion via plasma membrane adhesion molecules. Predicted to act upstream of or within dendrite development and regulation of synapse organization. Predicted to be located in dendrite and inhibitory synapse. Predicted to be integral component of membrane. Predicted to be active in axon and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.08192167).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
IGSF9	NM_001135050.2	c.2927C>T	p.Ser976Phe	missense_variant	Exon 19 of 21	ENST00000368094.6	NP_001128522.1
IGSF9	NM_020789.4	c.2879C>T	p.Ser960Phe	missense_variant	Exon 19 of 21		NP_065840.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
IGSF9	ENST00000368094.6	c.2927C>T	p.Ser976Phe	missense_variant	Exon 19 of 21	1	NM_001135050.2	ENSP00000357073.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152230 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

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: 0.00

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.00 AC: 0 AN: 226024 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1441784 Hom.: 0 Cov.: 35 AF XY: 0.00 AC XY: 0 AN XY: 714590

African (AFR) AF: 0.00 AC: 0 AN: 33088

American (AMR) AF: 0.00 AC: 0 AN: 42078

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25338

East Asian (EAS) AF: 0.00 AC: 0 AN: 39134

South Asian (SAS) AF: 0.00 AC: 0 AN: 84318

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52330

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5710

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1100376

Other (OTH) AF: 0.00 AC: 0 AN: 59412

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152230 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 74362

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 41462

American (AMR) AF: 0.0000654 AC: 1 AN: 15286

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68042

Other (OTH) AF: 0.00 AC: 0 AN: 2092

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	13
DANN	Benign	0.92
DEOGEN2	Benign	0.043	.;T;T
Eigen	Benign	-0.94
Eigen_PC	Benign	-0.96
FATHMM_MKL	Benign	0.049	N
LIST_S2	Benign	0.72	T;T;T
M_CAP	Benign	0.059	D
MetaRNN	Benign	0.082	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	.;L;.
PhyloP100		0.13
PrimateAI	Benign	0.48	T
PROVEAN	Benign	-1.3	N;N;.
REVEL	Benign	0.086
Sift	Benign	0.044	D;D;.
Sift4G	Benign	0.71	T;T;T
Polyphen		0.12	.;B;.
Vest4		0.10
MutPred		0.17		.;Loss of phosphorylation at S976 (P = 0.0067);.;
MVP		0.10
MPC		0.27
ClinPred		0.061	T
GERP RS		0.78
Varity_R		0.048
gMVP		0.27
Mutation Taster		=92/8	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs1242718842; hg19: chr1-159898251;