7-851955-G-T

Variant names:

• chr7-851955-G-T
• rs201864272
• NM_001130965.3:c.763G>T

Variant summary

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

The NM_001130965.3(SUN1):​c.763G>T​(p.Ala255Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,352 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. A255T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SUN1 NM_001130965.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.69
• Publications: 0 publications found

Genes affected

SUN1 (HGNC:18587): (Sad1 and UNC84 domain containing 1) This gene is a member of the unc-84 homolog family and encodes a nuclear envelope protein with an Unc84 (SUN) domain. The protein is involved in nuclear anchorage and migration. Alternatively spliced transcript variants have been described. [provided by RefSeq, Jan 2019]

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=0.2567973).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SUN1	NM_001130965.3	c.763G>T	p.Ala255Ser	missense_variant	Exon 7 of 19	ENST00000401592.6	NP_001124437.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SUN1	ENST00000401592.6	c.763G>T	p.Ala255Ser	missense_variant	Exon 7 of 19	1	NM_001130965.3	ENSP00000384015.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461352 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 727008

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

African (AFR) AF: 0.0000299 AC: 1 AN: 33462

American (AMR) AF: 0.00 AC: 0 AN: 44586

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86222

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111732

Other (OTH) AF: 0.00 AC: 0 AN: 60360

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.070	T
BayesDel_noAF	Benign	-0.34
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.066	.;.;T;.;.;T;T
Eigen	Uncertain	0.31
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.80	.;T;D;D;T;T;D
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.26	T;T;T;T;T;T;T
MetaSVM	Benign	-0.55	T
PhyloP100		4.7
PrimateAI	Benign	0.33	T
PROVEAN	Benign	-2.3	N;N;N;N;N;N;N
REVEL	Benign	0.13
Sift	Uncertain	0.012	D;D;D;D;D;T;D
Sift4G	Uncertain	0.020	D;T;D;T;D;D;D
Polyphen		0.96	D;.;.;.;D;.;.
Vest4		0.31
MVP		0.13
MPC		0.10
ClinPred		0.91	D
GERP RS		4.7
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.7
gMVP		0.33
Mutation Taster		=62/38	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: rs201864272; hg19: chr7-891592;