6-53128685-C-T

Position:

• chr6-53128685-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_003643.4(GCM1):​c.832G>A​(p.Asp278Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,818 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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: 0.0000027 (0 hom.)
• Consequence: GCM1 NM_003643.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.82

Genes affected

GCM1 (HGNC:4197): (glial cells missing transcription factor 1) This gene encodes a DNA-binding protein with a gcm-motif (glial cell missing motif). The encoded protein is a homolog of the Drosophila glial cells missing gene (gcm). This protein binds to the GCM-motif (A/G)CCCGCAT, a novel sequence among known targets of DNA-binding proteins. The N-terminal DNA-binding domain confers the unique DNA-binding activity of this protein. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2837535).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GCM1	NM_003643.4	c.832G>A	p.Asp278Asn	missense_variant	6/6	ENST00000259803.8	NP_003634.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GCM1	ENST00000259803.8	c.832G>A	p.Asp278Asn	missense_variant	6/6	1	NM_003643.4	ENSP00000259803	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000274 AC: 4 AN: 1461818 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727218

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000101

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.: 32

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

Sep 13, 2023

The c.832G>A (p.D278N) alteration is located in exon 6 (coding exon 5) of the GCM1 gene. This alteration results from a G to A substitution at nucleotide position 832, causing the aspartic acid (D) at amino acid position 278 to be replaced by an asparagine (N). 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	0.086
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.23	T
Eigen	Benign	0.020
Eigen_PC	Benign	0.071
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.63	T
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.28	T
MetaSVM	Benign	-0.87	T
MutationAssessor	Benign	1.9	L
MutationTaster	Benign	1.0	N
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.65	N
REVEL	Benign	0.19
Sift	Uncertain	0.0080	D
Sift4G	Benign	0.069	T
Polyphen		0.84	P
Vest4		0.26
MutPred		0.11		Loss of stability (P = 0.0681);
MVP		0.75
MPC		0.30
ClinPred		0.94	D
GERP RS		5.6
Varity_R		0.12
gMVP		0.18

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: rs3799268; hg19: chr6-52993483;