chr11-134345068-T-C

Position:

• chr11-134345068-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001370461.1(GLB1L2):​c.388T>C​(p.Trp130Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,212 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 Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 34)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: GLB1L2 NM_001370461.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.82

Genes affected

GLB1L2 (HGNC:25129): (galactosidase beta 1 like 2) Predicted to enable beta-galactosidase activity. Predicted to be involved in carbohydrate metabolic process. Predicted to be located in extracellular region. Predicted to be active in vacuole. [provided by Alliance of Genome Resources, Apr 2022]

GLB1L2 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.955

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GLB1L2	NM_001370461.1	c.388T>C	p.Trp130Arg	missense_variant	4/19	ENST00000535456.7	NP_001357390.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GLB1L2	ENST00000535456.7	c.388T>C	p.Trp130Arg	missense_variant	4/19	1	NM_001370461.1	ENSP00000444628.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461212 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 726786

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.00

GnomAD4 genome Cov.: 34

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 01, 2022

The c.388T>C (p.W130R) alteration is located in exon 4 (coding exon 4) of the GLB1L2 gene. This alteration results from a T to C substitution at nucleotide position 388, causing the tryptophan (W) at amino acid position 130 to be replaced by an arginine (R). 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	0.62
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.38
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.69	D;D
Eigen	Uncertain	0.57
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.86	D;.
M_CAP	Uncertain	0.24	D
MetaRNN	Pathogenic	0.95	D;D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Uncertain	2.8	M;M
PrimateAI	Uncertain	0.77	T
PROVEAN	Pathogenic	-13	D;D
REVEL	Pathogenic	0.82
Sift	Uncertain	0.0070	D;D
Sift4G	Uncertain	0.023	D;D
Polyphen		0.97	D;D
Vest4		0.79
MutPred		0.82		Gain of methylation at W130 (P = 0.0335);Gain of methylation at W130 (P = 0.0335);
MVP		0.70
MPC		0.59
ClinPred		1.0	D
GERP RS		4.4
Varity_R		0.85
gMVP		0.97

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: rs1943534534; hg19: chr11-134214962;