17-58206021-C-G

Variant names:

• chr17-58206021-C-G
• rs35384582
• NM_017777.4:c.*58G>C

Variant summary

Our verdict is Benign. The variant received -9 ACMG points: 0P and 9B. BP4_Strong BP6 BS2

The NM_017777.4(MKS1):​c.*58G>C variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000271 in 1,562,064 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.0015 (2 hom., cov: 32)
  • Exomes 𝑓: 0.00014 (0 hom.)
• Consequence: MKS1 NM_017777.4 3_prime_UTR
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: 0.344
• Publications: 0 publications found

Genes affected

MKS1 (HGNC:7121): (MKS transition zone complex subunit 1) The protein encoded by this gene localizes to the basal body and is required for formation of the primary cilium in ciliated epithelial cells. Mutations in this gene result in Meckel syndrome type 1 and in Bardet-Biedl syndrome type 13. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2009]

MKS1 Gene-Disease associations (from GenCC):

• Meckel syndrome, type 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Myriad Women’s Health, Labcorp Genetics (formerly Invitae)
• Bardet-Biedl syndrome 13

  Inheritance: Unknown, AR Classification: DEFINITIVE, STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, G2P
• Joubert syndrome 28

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Bardet-Biedl syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Joubert syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Joubert syndrome with ocular defect

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Meckel syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 17-58206021-C-G is Benign according to our data. Variant chr17-58206021-C-G is described in ClinVar as [Likely_benign]. Clinvar id is 3037883.Status of the report is no_assertion_criteria_provided, 0 stars.
• BS2: High Homozygotes in GnomAd4 at 2 AR,Unknown gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MKS1	NM_017777.4	c.*58G>C		3_prime_UTR_variant	Exon 18 of 18	ENST00000393119.7	NP_060247.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MKS1	ENST00000393119.7	c.*58G>C		3_prime_UTR_variant	Exon 18 of 18	1	NM_017777.4	ENSP00000376827.2

Frequencies

GnomAD3 genomes AF: 0.00152 AC: 232 AN: 152144 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.00531

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000589

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: 0.0000147

Gnomad OTH AF: 0.000957

GnomAD4 exome AF: 0.000136 AC: 192 AN: 1409802 Hom.: 0 Cov.: 32 AF XY: 0.000113 AC XY: 79 AN XY: 696894

African (AFR) AF: 0.00483 AC: 155 AN: 32108

American (AMR) AF: 0.000406 AC: 15 AN: 36950

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25304

East Asian (EAS) AF: 0.00 AC: 0 AN: 36774

South Asian (SAS) AF: 0.0000124 AC: 1 AN: 80784

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48144

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4182

European-Non Finnish (NFE) AF: 0.00000184 AC: 2 AN: 1087134

Other (OTH) AF: 0.000325 AC: 19 AN: 58422

GnomAD4 genome AF: 0.00152 AC: 232 AN: 152262 Hom.: 2 Cov.: 32 AF XY: 0.00173 AC XY: 129 AN XY: 74458

African (AFR) AF: 0.00530 AC: 220 AN: 41544

American (AMR) AF: 0.000588 AC: 9 AN: 15300

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5172

South Asian (SAS) AF: 0.00 AC: 0 AN: 4822

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68010

Other (OTH) AF: 0.000947 AC: 2 AN: 2112

Alfa AF: 0.00125 Hom.: 0

Bravo AF: 0.00172

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

Submissions by phenotype

MKS1-related disorder Benign:1

Apr 30, 2019

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	1.8
DANN	Benign	0.68
PhyloP100		0.34
Mutation Taster		=100/0	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: rs35384582; hg19: chr17-56283382;