2-131521067-G-T

Variant names:

• chr2-131521067-G-T
• rs705090
• ENST00000438378.3:n.3279G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The ENST00000438378.3(SMPD4BP):​n.3279G>T variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000667 in 149,924 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000067 (0 hom., cov: 27)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SMPD4BP ENST00000438378.3 non_coding_transcript_exon
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.244
• Publications: 2 publications found

Genes affected

SMPD4BP (HGNC:):

SMPD4BP (HGNC:24761): (sphingomyelin phosphodiesterase 4B, pseudogene)

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.88).

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000438378.3. 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
	SMPD4BP	NR_026922.1		n.3279G>T		non_coding_transcript_exon	Exon 18 of 18

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SMPD4BP	ENST00000438378.3	TSL:1	n.3279G>T		non_coding_transcript_exon	Exon 18 of 18
	SMPD4BP	ENST00000850260.1		n.3046G>T		non_coding_transcript_exon	Exon 20 of 20

Frequencies

GnomAD3 genomes AF: 0.00000667 AC: 1 AN: 149924 Hom.: 0 Cov.: 27

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000212

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 468 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 266

African (AFR) AF: 0.00 AC: 0 AN: 2

American (AMR) AF: 0.00 AC: 0 AN: 4

Ashkenazi Jewish (ASJ) AC: 0 AN: 0

East Asian (EAS) AC: 0 AN: 0

South Asian (SAS) AC: 0 AN: 0

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 318

Middle Eastern (MID) AC: 0 AN: 0

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 142

Other (OTH) AF: 0.00 AC: 0 AN: 2

GnomAD4 genome AF: 0.00000667 AC: 1 AN: 149924 Hom.: 0 Cov.: 27 AF XY: 0.0000137 AC XY: 1 AN XY: 73064

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 40282

American (AMR) AF: 0.00 AC: 0 AN: 14984

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3454

East Asian (EAS) AF: 0.00 AC: 0 AN: 5046

South Asian (SAS) AF: 0.000212 AC: 1 AN: 4710

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10438

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 310

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67744

Other (OTH) AF: 0.00 AC: 0 AN: 2052

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 276

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.88
CADD	Benign	5.1
DANN	Benign	0.48
PhyloP100		-0.24

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs705090;

hg19: chr2-132278640;