Variant chr1-26022954-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_004455.3(EXTL1):c.308C>A(p.Ala103Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000239 in 1,461,774 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

EXTL1
NM_004455.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.286

Variant links:

Genes affected

EXTL1 (HGNC:3515): (exostosin like glycosyltransferase 1) This gene is a member of the multiple exostoses (EXT) family of glycosyltransferases, which function in the chain polymerization of heparan sulfate and heparin. The encoded protein harbors alpha 1,4- N-acetylglucosaminyltransferase activity, and is involved in chain elongation of heparan sulfate and possibly heparin. [provided by RefSeq, Jul 2008]

EXTL1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.09207541).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
EXTL1	NM_004455.3 linkuse as main transcript	c.308C>A	p.Ala103Glu	missense_variant	1/11	ENST00000374280.4	NP_004446.2
EXTL1	XM_005245779.5 linkuse as main transcript	c.308C>A	p.Ala103Glu	missense_variant	1/10		XP_005245836.1
EXTL1	XM_017000650.3 linkuse as main transcript	c.308C>A	p.Ala103Glu	missense_variant	1/8		XP_016856139.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
EXTL1	ENST00000374280.4 linkuse as main transcript	c.308C>A	p.Ala103Glu	missense_variant	1/11	1	NM_004455.3	ENSP00000363398	P1
EXTL1	ENST00000481377.5 linkuse as main transcript	n.61+3010C>A		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251408

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135878

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000703

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000239

AC:

AN:

1461774

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727196

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:

0.0000306

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000282

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Mar 31, 2023

The c.308C>A (p.A103E) alteration is located in exon 1 (coding exon 1) of the EXTL1 gene. This alteration results from a C to A substitution at nucleotide position 308, causing the alanine (A) at amino acid position 103 to be replaced by a glutamic acid (E). 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

Benign

0.11

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.31

CADD

Benign

0.15

DANN

Benign

0.29

DEOGEN2

Benign

0.17

Eigen

Benign

-0.93

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.030

LIST_S2

Benign

0.68

M_CAP

Uncertain

0.094

MetaRNN

Benign

0.092

MetaSVM

Uncertain

-0.15

MutationAssessor

Uncertain

2.1

MutationTaster

Benign

1.0

PrimateAI

Benign

0.23

PROVEAN

Benign

0.28

REVEL

Benign

0.22

Sift

Benign

1.0

Sift4G

Benign

1.0

Polyphen

0.47

Vest4

0.24

MutPred

0.56

Gain of solvent accessibility (P = 0.0674);

MVP

0.43

MPC

0.77

ClinPred

0.084

GERP RS

-0.54

Varity_R

0.087

gMVP

0.51

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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