Genetic Variant LGR5:p.His218Gln (chr12-71556628-T-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_003667.4(LGR5):c.654T>G(p.His218Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,609,146 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

LGR5
NM_003667.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.60

Variant links:

Genes affected

LGR5 (HGNC:4504): (leucine rich repeat containing G protein-coupled receptor 5) The protein encoded by this gene is a leucine-rich repeat-containing receptor (LGR) and member of the G protein-coupled, 7-transmembrane receptor (GPCR) superfamily. The encoded protein is a receptor for R-spondins and is involved in the canonical Wnt signaling pathway. This protein plays a role in the formation and maintenance of adult intestinal stem cells during postembryonic development. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2015]

LGR5 links:

LOC105369833 (HGNC:):

LOC105369833 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LGR5	NM_003667.4 link	c.654T>G	p.His218Gln	missense_variant	Exon 6 of 18	ENST00000266674.10	NP_003658.1	O75473-1A0A0A8K8C7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
LGR5	ENST00000266674.10 link	c.654T>G	p.His218Gln	missense_variant	Exon 6 of 18	1	NM_003667.4	ENSP00000266674.4	O75473-1
LGR5	ENST00000540815.2 link	c.654T>G	p.His218Gln	missense_variant	Exon 6 of 17	1		ENSP00000441035.2	O75473-2
LGR5	ENST00000536515.5 link	c.438T>G	p.His146Gln	missense_variant	Exon 5 of 17	1		ENSP00000443033.1	O75473-3
LGR5	ENST00000550851.5 link	n.751T>G		non_coding_transcript_exon_variant	Exon 6 of 20	2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152218

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

6.86e-7

AC:

AN:

1456928

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725094

show subpopulations

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152218

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74380

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000264

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 09, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.654T>G (p.H218Q) alteration is located in exon 6 (coding exon 6) of the LGR5 gene. This alteration results from a T to G substitution at nucleotide position 654, causing the histidine (H) at amino acid position 218 to be replaced by a glutamine (Q). 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

Pathogenic

0.94

BayesDel_addAF

Uncertain

0.063

BayesDel_noAF

Benign

-0.15

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Benign

0.34

T;.;.

Eigen

Benign

0.17

Eigen_PC

Uncertain

0.31

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.90

D;T;T

M_CAP

Benign

0.013

MetaRNN

Uncertain

0.65

D;D;D

MetaSVM

Benign

-0.72

MutationAssessor

Benign

0.12

N;.;N

PrimateAI

Pathogenic

0.82

PROVEAN

Pathogenic

-6.5

D;D;D

REVEL

Benign

0.17

Sift

Benign

0.044

D;D;D

Sift4G

Uncertain

0.0070

D;D;D

Polyphen

0.97

D;.;B

Vest4

0.74

MutPred

0.41

Gain of catalytic residue at R221 (P = 5e-04);.;Gain of catalytic residue at R221 (P = 5e-04);

MVP

0.82

MPC

0.12

ClinPred

0.98

GERP RS

5.5

Varity_R

0.81

gMVP

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over