1-100874231-G-A

Variant names:

• chr1-100874231-G-A
• rs147366080
• NM_001033025.3:c.704C>T

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_001033025.3(EXTL2):​c.704C>T​(p.Ala235Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000392 in 1,612,786 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00029 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00040 (1 hom.)
• Consequence: EXTL2 NM_001033025.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.06
• Publications: 3 publications found

Genes affected

EXTL2 (HGNC:3516): (exostosin like glycosyltransferase 2) Enables alpha-1,4-N-acetylgalactosaminyltransferase activity and glucuronyl-galactosyl-proteoglycan 4-alpha-N-acetylglucosaminyltransferase activity. Involved in N-acetylglucosamine metabolic process and UDP-N-acetylgalactosamine metabolic process. Located in cytosol; endoplasmic reticulum; and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.034500957).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001033025.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EXTL2	NM_001033025.3	MANE Select	c.704C>T	p.Ala235Val	missense	Exon 5 of 5	NP_001028197.1	Q9UBQ6
	EXTL2	NM_001261441.2		c.728C>T	p.Ala243Val	missense	Exon 6 of 6	NP_001248370.1
	EXTL2	NM_001439.4		c.704C>T	p.Ala235Val	missense	Exon 5 of 5	NP_001430.1	Q9UBQ6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	EXTL2	ENST00000370114.8	TSL:1 MANE Select	c.704C>T	p.Ala235Val	missense	Exon 5 of 5	ENSP00000359132.3	Q9UBQ6
	EXTL2	ENST00000370113.7	TSL:1	c.704C>T	p.Ala235Val	missense	Exon 5 of 5	ENSP00000359131.3	Q9UBQ6
	EXTL2	ENST00000886545.1		c.728C>T	p.Ala243Val	missense	Exon 6 of 6	ENSP00000556603.1

Frequencies

GnomAD3 genomes AF: 0.000290 AC: 44 AN: 151966 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000656

Gnomad ASJ AF: 0.00115

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000412

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.000476 AC: 119 AN: 249852 AF XY: 0.000511

Gnomad AFR exome AF: 0.000247

Gnomad AMR exome AF: 0.00119

Gnomad ASJ exome AF: 0.00149

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000479

Gnomad OTH exome AF: 0.000825

GnomAD4 exome AF: 0.000403 AC: 589 AN: 1460702 Hom.: 1 Cov.: 32 AF XY: 0.000400 AC XY: 291 AN XY: 726636

African (AFR) AF: 0.000239 AC: 8 AN: 33418

American (AMR) AF: 0.00106 AC: 47 AN: 44542

Ashkenazi Jewish (ASJ) AF: 0.00184 AC: 48 AN: 26096

East Asian (EAS) AF: 0.00 AC: 0 AN: 39662

South Asian (SAS) AF: 0.00 AC: 0 AN: 86196

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53342

Middle Eastern (MID) AF: 0.000348 AC: 2 AN: 5742

European-Non Finnish (NFE) AF: 0.000408 AC: 454 AN: 1111402

Other (OTH) AF: 0.000481 AC: 29 AN: 60302

GnomAD4 genome AF: 0.000289 AC: 44 AN: 152084 Hom.: 0 Cov.: 32 AF XY: 0.000229 AC XY: 17 AN XY: 74360

African (AFR) AF: 0.0000482 AC: 2 AN: 41516

American (AMR) AF: 0.000655 AC: 10 AN: 15260

Ashkenazi Jewish (ASJ) AF: 0.00115 AC: 4 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5152

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10600

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000412 AC: 28 AN: 67946

Other (OTH) AF: 0.00 AC: 0 AN: 2110

Alfa AF: 0.000457 Hom.: 0

Bravo AF: 0.000400

TwinsUK AF: 0.000539 AC: 2

ALSPAC AF: 0.000778 AC: 3

ESP6500AA AF: 0.000454 AC: 2

ESP6500EA AF: 0.000582 AC: 5

ExAC AF: 0.000379 AC: 46

EpiCase AF: 0.000546

EpiControl AF: 0.000712

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.40	T
Eigen	Benign	-0.12
Eigen_PC	Benign	-0.035
FATHMM_MKL	Benign	0.58	D
LIST_S2	Uncertain	0.86	D
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.035	T
MetaSVM	Benign	-0.70	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		3.1
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.24
Sift	Benign	0.28	T
Sift4G	Benign	0.26	T
Polyphen		0.0020	B
Vest4		0.10
MVP		0.77
MPC		0.16
ClinPred		0.015	T
GERP RS		5.1
Varity_R		0.057
gMVP		0.32
Mutation Taster		=94/6	polymorphism

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

Other links and lift over

dbSNP: rs147366080; hg19: chr1-101339787;