dbSNP rs1017504534: LRRC73:p.Gly24Arg (chr6-43509716-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001012974.4(LRRC73):c.70G>C(p.Gly24Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000695 in 1,439,076 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. 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. G24S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

LRRC73
NM_001012974.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.52

Publications

0 publications found

Variant links:

Genes affected

LRRC73 (HGNC:21375): (leucine rich repeat containing 73)

LRRC73 links:

POLR1C (HGNC:20194): (RNA polymerase I and III subunit C) The protein encoded by this gene is a subunit of both RNA polymerase I and RNA polymerase III complexes. The encoded protein is part of the Pol core element. Mutations in this gene have been associated with Treacher Collins syndrome (TCS) and hypomyelinating leukodystrophy 11. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2016]

POLR1C Gene-Disease associations (from GenCC):

hypomyelinating leukodystrophy 11
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
Treacher Collins syndrome 3
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, ClinGen
Treacher-Collins syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
hypomyelination-hypogonadotropic hypogonadism-hypodontia syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

POLR1C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.19896671).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LRRC73	NM_001012974.4 link	c.70G>C	p.Gly24Arg	missense_variant	Exon 1 of 6	ENST00000372441.2	NP_001012992.1	Q5JTD7
LRRC73	NM_001271882.2 link	c.-98+490G>C		intron_variant	Intron 1 of 5		NP_001258811.1	Q5JTD7Q3B825

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LRRC73	ENST00000372441.2 link	c.70G>C	p.Gly24Arg	missense_variant	Exon 1 of 6	1	NM_001012974.4	ENSP00000361518.1		Q5JTD7
POLR1C	ENST00000428025.6 link	c.-189C>G		5_prime_UTR_variant	Exon 1 of 6	4		ENSP00000395401.2		D6RDJ3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.95e-7

AC:

AN:

1439076

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

715534

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33228

American (AMR)

AF:

0.00

AC:

AN:

43774

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25836

East Asian (EAS)

AF:

0.00

AC:

AN:

39280

South Asian (SAS)

AF:

0.00

AC:

AN:

84954

European-Finnish (FIN)

AF:

0.00

AC:

AN:

39224

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5412

European-Non Finnish (NFE)

AF:

9.03e-7

AC:

AN:

1107632

Other (OTH)

AF:

0.00

AC:

AN:

59736

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.89

BayesDel_addAF

Benign

-0.020

BayesDel_noAF

Benign

-0.27

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.028

Eigen

Benign

-0.095

Eigen_PC

Benign

0.038

FATHMM_MKL

Uncertain

0.86

LIST_S2

Benign

0.79

M_CAP

Benign

0.054

MetaRNN

Benign

0.20

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.8

PhyloP100

3.5

PrimateAI

Pathogenic

0.90

PROVEAN

Benign

-1.3

REVEL

Benign

0.19

Sift

Benign

0.16

Sift4G

Uncertain

0.052

Polyphen

0.086

Vest4

0.30

MutPred

0.52

Gain of MoRF binding (P = 0.0176);

MVP

0.068

MPC

0.89

ClinPred

0.79

GERP RS

4.1

PromoterAI

-0.12

Neutral

(source)

Varity_R

0.13

gMVP

0.64

Mutation Taster

=81/19

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over