2-26402025-G-C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_145038.5(DRC1):c.36G>C(p.Pro12=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00165 in 1,612,076 control chromosomes in the GnomAD database, including 34 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0087 (18 hom., cov: 32)
  • Exomes 𝑓: 0.00091 (16 hom.)
• Consequence: DRC1 NM_145038.5 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -0.335

Genes affected

DRC1 (HGNC:24245): (dynein regulatory complex subunit 1) This gene encodes a central component of the nexin-dynein complex (N-DRC), which regulates the assembly of ciliary dynein. Mutations in this gene can cause ciliary dyskinesia. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.63).
• BP6: Variant 2-26402025-G-C is Benign according to our data. Variant chr2-26402025-G-C is described in ClinVar as [Likely_benign]. Clinvar id is 241940.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-0.335 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00874 (1332/152326) while in subpopulation AFR AF= 0.0306 (1270/41568). AF 95% confidence interval is 0.0292. There are 18 homozygotes in gnomad4. There are 641 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd at 18 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DRC1	NM_145038.5	c.36G>C	p.Pro12=	synonymous_variant	1/17	ENST00000288710.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DRC1	ENST00000288710.7	c.36G>C	p.Pro12=	synonymous_variant	1/17	2	NM_145038.5	P1
DRC1	ENST00000421869.5	c.36G>C	p.Pro12=	synonymous_variant, NMD_transcript_variant	1/8	1
DRC1	ENST00000649059.1	c.24G>C	p.Pro8=	synonymous_variant, NMD_transcript_variant	1/16

Frequencies

GnomAD3 genomes AF: 0.00872 AC: 1327 AN: 152208 Hom.: 18 Cov.: 32

Gnomad AFR AF: 0.0305

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00249

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.00669

GnomAD3 exomes AF: 0.00223 AC: 547 AN: 245552 Hom.: 7 AF XY: 0.00160 AC XY: 214 AN XY: 133340

Gnomad AFR exome AF: 0.0319

Gnomad AMR exome AF: 0.000963

Gnomad ASJ exome AF: 0.000201

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000665

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000814

Gnomad OTH exome AF: 0.000835

GnomAD4 exome AF: 0.000912 AC: 1332 AN: 1459750 Hom.: 16 Cov.: 30 AF XY: 0.000788 AC XY: 572 AN XY: 725928

Gnomad4 AFR exome AF: 0.0315

Gnomad4 AMR exome AF: 0.00130

Gnomad4 ASJ exome AF: 0.000192

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000699

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000819

Gnomad4 OTH exome AF: 0.00169

GnomAD4 genome AF: 0.00874 AC: 1332 AN: 152326 Hom.: 18 Cov.: 32 AF XY: 0.00861 AC XY: 641 AN XY: 74480

Gnomad4 AFR AF: 0.0306

Gnomad4 AMR AF: 0.00248

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000103

Gnomad4 OTH AF: 0.00662

Alfa AF: 0.00277 Hom.: 3

Bravo AF: 0.00989

Asia WGS AF: 0.00231 AC: 8 AN: 3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Mar 29, 2016

Variant identified in a genome or exome case(s) and assessed due to predicted null impact of the variant or pathogenic assertions in the literature or databases. Disclaimer: This variant has not undergone full assessment. The following are preliminary notes: Frequency -

Primary ciliary dyskinesia Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 25, 2024

- -

Primary ciliary dyskinesia 21 Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

May 03, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.63
Cadd	Benign	3.0
Dann	Benign	0.53

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: rs116549039; hg19: chr2-26624893;