chr8-19405837-G-C

Position:

• chr8-19405837-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001354483.2(CSGALNACT1):​c.1542C>G​(p.His514Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CSGALNACT1 NM_001354483.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.422

Genes affected

CSGALNACT1 (HGNC:24290): (chondroitin sulfate N-acetylgalactosaminyltransferase 1) This gene encodes an enzyme that transfers N-acetylglucosamine (GalNAc) to the core tetrasaccharide linker and to elongating chondroitin sulfate chains in proteoglycans. Knockout of the orthologous mouse gene indicates that the protein is necessary for normal cartilage development and aggrecan metabolism. Mutations in this gene are associated with multiple sclerosis progression, and with mild skeletal dysplasia and joint laxity. [provided by RefSeq, Aug 2017]

CSGALNACT1 (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.048892856).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
CSGALNACT1	NM_001354483.2	c.1542C>G	p.His514Gln	missense_variant	9/9	ENST00000692225.2	NP_001341412.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
CSGALNACT1	ENST00000692225.2	c.1542C>G	p.His514Gln	missense_variant	9/9		NM_001354483.2	ENSP00000509853.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 14, 2024

The c.1542C>G (p.H514Q) alteration is located in exon 10 (coding exon 7) of the CSGALNACT1 gene. This alteration results from a C to G substitution at nucleotide position 1542, causing the histidine (H) at amino acid position 514 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	Benign	0.076
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	3.3
DANN	Benign	0.95
DEOGEN2	Benign	0.032	T;T;T
Eigen	Benign	-0.96
Eigen_PC	Benign	-0.85
FATHMM_MKL	Benign	0.34	N
LIST_S2	Benign	0.59	.;.;T
M_CAP	Benign	0.0093	T
MetaRNN	Benign	0.049	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.36	N;N;N
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	0.32	N;N;N
REVEL	Benign	0.14
Sift	Benign	0.24	T;T;T
Sift4G	Benign	0.32	T;T;T
Polyphen		0.011	B;B;B
Vest4		0.17
MutPred		0.27		Gain of MoRF binding (P = 0.0826);Gain of MoRF binding (P = 0.0826);Gain of MoRF binding (P = 0.0826);
MVP		0.17
MPC		0.017
ClinPred		0.18	T
GERP RS		-1.2
Varity_R		0.14
gMVP		0.31

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: chr8-19263348;