rs267606794

Positions:

• chr2-61840319-G-A

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_001201543.2(FAM161A):​c.685C>T​(p.Arg229*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,796 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: FAM161A NM_001201543.2 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:10
• Conservation: PhyloP100: 1.02

Genes affected

FAM161A (HGNC:25808): (FAM161 centrosomal protein A) This gene belongs to the FAM161 family. It is expressed mainly in the retina. Mouse studies suggested that this gene is involved in development of retinal progenitors during embryogenesis, and that its activity is restricted to mature photoreceptors after birth. Mutations in this gene cause autosomal recessive retinitis pigmentosa-28. Alternatively spliced transcript variants have been identified.[provided by RefSeq, Jan 2011]

FAM161A (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 2-61840319-G-A is Pathogenic according to our data. Variant chr2-61840319-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 35.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr2-61840319-G-A is described in Lovd as [Likely_pathogenic]. Variant chr2-61840319-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FAM161A	NM_001201543.2	c.685C>T	p.Arg229*	stop_gained	3/7	ENST00000404929.6	NP_001188472.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FAM161A	ENST00000404929.6	c.685C>T	p.Arg229*	stop_gained	3/7	1	NM_001201543.2	ENSP00000385158.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000802 AC: 2 AN: 249278 Hom.: 0 AF XY: 0.00000739 AC XY: 1 AN XY: 135234

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 SAS exome AF: 0.0000654

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461796 Hom.: 0 Cov.: 34 AF XY: 0.00000413 AC XY: 3 AN XY: 727194

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000348

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000828 AC: 1

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:10

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Retinitis pigmentosa 28 Pathogenic:4

Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Jul 28, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 01, 2022	- -
Pathogenic, no assertion criteria provided	literature only	OMIM	Sep 10, 2010	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Feb 04, 2024	- -

not provided Pathogenic:3

Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Sep 10, 2023	This sequence change creates a premature translational stop signal (p.Arg229*) in the FAM161A gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in FAM161A are known to be pathogenic (PMID: 20705278, 20705279, 24651477). This variant is present in population databases (rs267606794, gnomAD 0.007%). For these reasons, this variant has been classified as Pathogenic. ClinVar contains an entry for this variant (Variation ID: 35). This premature translational stop signal has been observed in individual(s) with retinitis pigmentosa (PMID: 10507729, 20705278, 26355662). It has also been observed to segregate with disease in related individuals. -
Pathogenic, criteria provided, single submitter	clinical testing	Institute of Medical Genetics and Applied Genomics, University Hospital Tübingen	Sep 15, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jan 01, 2023	FAM161A: PVS1, PM2, PM3, PS4:Supporting -

Retinal dystrophy Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Blueprint Genetics	Oct 31, 2018	- -
Pathogenic, criteria provided, single submitter	research	Ophthalmic Genetics Group, Institute of Molecular and Clinical Ophthalmology Basel	May 27, 2024	- -

Autosomal recessive retinitis pigmentosa Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

Faculty of Health Sciences, Beirut Arab University

Sep 10, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.50	D
BayesDel_noAF	Uncertain	0.070
CADD	Pathogenic	35
DANN	Uncertain	0.99
Eigen	Benign	-0.043
Eigen_PC	Benign	-0.37
FATHMM_MKL	Benign	0.11	N
Vest4		0.11
GERP RS		0.41

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: rs267606794; hg19: chr2-62067454; COSMIC: COSV56765545; COSMIC: COSV56765545;