chr15-40471278-T-C

Position:

• chr15-40471278-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_130468.4(CHST14):​c.65T>C​(p.Leu22Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000148 in 1,353,554 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: 32)
  • Exomes 𝑓: 0.0000015 (0 hom.)
• Consequence: CHST14 NM_130468.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.393

Genes affected

CHST14 (HGNC:24464): (carbohydrate sulfotransferase 14) This gene encodes a member of the HNK-1 family of sulfotransferases. The encoded protein transfers sulfate to the C-4 hydroxyl of N-acetylgalactosamine residues in dermatan sulfate. Mutations in this gene have been associated with adducted thumb-clubfoot syndrome.[provided by RefSeq, Mar 2010]

ACMG classification

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=0.09731227).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CHST14	NM_130468.4	c.65T>C	p.Leu22Pro	missense_variant	1/1	ENST00000306243.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CHST14	ENST00000306243.7	c.65T>C	p.Leu22Pro	missense_variant	1/1		NM_130468.4	P1
CHST14	ENST00000559991.1	c.65T>C	p.Leu22Pro	missense_variant	1/2	5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000148 AC: 2 AN: 1353554 Hom.: 0 Cov.: 32 AF XY: 0.00000150 AC XY: 1 AN XY: 667752

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: 0.0000131

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.37e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Ehlers-Danlos syndrome, musculocontractural type Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 13, 2022

Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The proline amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. This variant has not been reported in the literature in individuals affected with CHST14-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces leucine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 22 of the CHST14 protein (p.Leu22Pro). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.047
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	14
DANN	Benign	0.73
DEOGEN2	Benign	0.020	T;.
Eigen	Benign	-0.87
Eigen_PC	Benign	-0.79
FATHMM_MKL	Benign	0.16	N
LIST_S2	Benign	0.30	T;T
M_CAP	Pathogenic	0.30	D
MetaRNN	Benign	0.097	T;T
MetaSVM	Benign	-0.92	T
MutationAssessor	Benign	0.0	N;.
MutationTaster	Benign	0.75	N;N
PrimateAI	Pathogenic	0.84	D
PROVEAN	Benign	0.19	N;N
REVEL	Benign	0.13
Sift	Benign	0.074	T;T
Sift4G	Benign	0.27	T;T
Polyphen		0.0	B;.
Vest4		0.052
MutPred		0.42		Loss of helix (P = 3e-04);Loss of helix (P = 3e-04);
MVP		0.068
MPC		1.4
ClinPred		0.021	T
GERP RS		-2.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.072
gMVP		0.43

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr15-40763477;