rs767244307

Positions:

• chr11-68908208-C-A
• chr11-68908208-C-G
• chr11-68908208-C-T

Variant summary

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

The NM_002180.3(IGHMBP2):​c.320C>A​(p.Thr107Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,866 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. T107S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: IGHMBP2 NM_002180.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.24

Genes affected

IGHMBP2 (HGNC:5542): (immunoglobulin mu DNA binding protein 2) This gene encodes a helicase superfamily member that binds a specific DNA sequence from the immunoglobulin mu chain switch region. Mutations in this gene lead to spinal muscle atrophy with respiratory distress type 1. [provided by RefSeq, Jul 2008]

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/exons	MANE	UniProt
IGHMBP2	NM_002180.3	c.320C>A	p.Thr107Asn	missense_variant	3/15	ENST00000255078.8
IGHMBP2	XM_047426881.1	c.320C>A	p.Thr107Asn	missense_variant	3/15
IGHMBP2	XM_017017671.3	c.320C>A	p.Thr107Asn	missense_variant	3/12
IGHMBP2	XM_005273976.3	c.320C>A	p.Thr107Asn	missense_variant	3/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
IGHMBP2	ENST00000255078.8	c.320C>A	p.Thr107Asn	missense_variant	3/15	1	NM_002180.3	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.0000119 AC: 3 AN: 251482 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135916

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.000163

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461866 Hom.: 0 Cov.: 32 AF XY: 0.00000138 AC XY: 1 AN XY: 727232

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ExAC AF: 0.0000165 AC: 2

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Benign	-0.046	T
BayesDel_noAF	Uncertain	-0.040
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Benign	0.18	T;.
Eigen	Benign	0.079
Eigen_PC	Benign	0.15
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.82	T;T
M_CAP	Uncertain	0.093	D
MetaRNN	Uncertain	0.65	D;D
MetaSVM	Uncertain	0.30	D
MutationAssessor	Pathogenic	3.0	M;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-2.2	N;D
REVEL	Uncertain	0.45
Sift	Benign	0.29	T;T
Sift4G	Benign	0.20	T;D
Polyphen		0.059	B;.
Vest4		0.73
MutPred		0.38		Loss of ubiquitination at K112 (P = 0.1166);Loss of ubiquitination at K112 (P = 0.1166);
MVP		0.92
MPC		0.73
ClinPred		0.65	D
GERP RS		3.8
Varity_R		0.24
gMVP		0.71

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

LitVar

Other links and lift over

dbSNP: rs767244307; hg19: chr11-68675676;