16-56940008-A-C

Position:

• chr16-56940008-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_014685.4(HERPUD1):​c.668A>C​(p.Asn223Thr) variant causes a missense change. The variant allele was found at a frequency of 0.00000274 in 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: HERPUD1 NM_014685.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.85

Genes affected

HERPUD1 (HGNC:13744): (homocysteine inducible ER protein with ubiquitin like domain 1) The accumulation of unfolded proteins in the endoplasmic reticulum (ER) triggers the ER stress response. This response includes the inhibition of translation to prevent further accumulation of unfolded proteins, the increased expression of proteins involved in polypeptide folding, known as the unfolded protein response (UPR), and the destruction of misfolded proteins by the ER-associated protein degradation (ERAD) system. This gene may play a role in both UPR and ERAD. Its expression is induced by UPR and it has an ER stress response element in its promoter region while the encoded protein has an N-terminal ubiquitin-like domain which may interact with the ERAD system. This protein has been shown to interact with presenilin proteins and to increase the level of amyloid-beta protein following its overexpression. Alternative splicing of this gene produces multiple transcript variants encoding different isoforms. The full-length nature of all transcript variants has not been determined. [provided by RefSeq, Jan 2013]

HERPUD1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.23250163).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
HERPUD1	NM_014685.4	c.668A>C	p.Asn223Thr	missense_variant	6/8	ENST00000439977.7	NP_055500.1
HERPUD1	NM_001010989.3	c.665A>C	p.Asn222Thr	missense_variant	6/8		NP_001010989.1
HERPUD1	NM_001272103.2	c.668A>C	p.Asn223Thr	missense_variant	6/8		NP_001259032.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
HERPUD1	ENST00000439977.7	c.668A>C	p.Asn223Thr	missense_variant	6/8	1	NM_014685.4	ENSP00000409555.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461880 Hom.: 0 Cov.: 32 AF XY: 0.00000413 AC XY: 3 AN XY: 727240

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome Cov.: 32

Asia WGS AF: 0.00144 AC: 5 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 13, 2024

The c.668A>C (p.N223T) alteration is located in exon 6 (coding exon 6) of the HERPUD1 gene. This alteration results from a A to C substitution at nucleotide position 668, causing the asparagine (N) at amino acid position 223 to be replaced by a threonine (T). 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	0.21
BayesDel_addAF	Benign	-0.084	T
BayesDel_noAF	Benign	-0.36
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.56	D;.;.
Eigen	Uncertain	0.64
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.87	D;D;D
M_CAP	Benign	0.023	T
MetaRNN	Benign	0.23	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.6	M;.;.
PrimateAI	Uncertain	0.56	T
PROVEAN	Uncertain	-3.1	D;D;D
REVEL	Benign	0.12
Sift	Uncertain	0.0060	D;D;D
Sift4G	Uncertain	0.021	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.23
MutPred		0.32		Gain of glycosylation at N223 (P = 0.016);.;.;
MVP		0.55
MPC		0.75
ClinPred		0.94	D
GERP RS		5.7
Varity_R		0.41
gMVP		0.43

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: rs1286108234; hg19: chr16-56973920;