rs55916387

Variant names:

• chr18-33666280-A-G
• rs55916387
• NM_030632.3:c.478-4393A>G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_030632.3(ASXL3):​c.478-4393A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0253 in 152,290 control chromosomes in the GnomAD database, including 61 homozygotes. 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 0.025 (61 hom., cov: 32)
• Consequence: ASXL3 NM_030632.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.26

Genes affected

ASXL3 (HGNC:29357): (ASXL transcriptional regulator 3) This gene encodes a protein containing a plant homeodomain (PHD) zinc finger domain that plays a role in the regulation of gene transcription. The encoded protein has been shown to negatively regulate lipogenesis by binding to and inhibiting the transcriptional activity of two nuclear hormone receptors, oxysterols receptor LXR-alpha (LXRalpha) and thyroid hormone receptor beta (TRbeta). The encoded protein may also inhibit histone deubiquitination. Mutations in this gene have been identified in human patients with Bainbridge-Ropers syndrome, which is characterized by feeding difficulties, developmental delay and other features. [provided by RefSeq, May 2017]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0253 (3848/152290) while in subpopulation NFE AF= 0.0365 (2482/68012). AF 95% confidence interval is 0.0353. There are 61 homozygotes in gnomad4. There are 1753 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 3848 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ASXL3	NM_030632.3	c.478-4393A>G		intron_variant	Intron 5 of 11	ENST00000269197.12	NP_085135.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ASXL3	ENST00000269197.12	c.478-4393A>G		intron_variant	Intron 5 of 11	5	NM_030632.3	ENSP00000269197.4

Frequencies

GnomAD3 genomes AF: 0.0253 AC: 3846 AN: 152172 Hom.: 61 Cov.: 32

Gnomad AFR AF: 0.00647

Gnomad AMI AF: 0.0570

Gnomad AMR AF: 0.0276

Gnomad ASJ AF: 0.0922

Gnomad EAS AF: 0.000192

Gnomad SAS AF: 0.00995

Gnomad FIN AF: 0.0164

Gnomad MID AF: 0.0411

Gnomad NFE AF: 0.0365

Gnomad OTH AF: 0.0316

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.0253 AC: 3848 AN: 152290 Hom.: 61 Cov.: 32 AF XY: 0.0235 AC XY: 1753 AN XY: 74478

Gnomad4 AFR AF: 0.00645

Gnomad4 AMR AF: 0.0275

Gnomad4 ASJ AF: 0.0922

Gnomad4 EAS AF: 0.000193

Gnomad4 SAS AF: 0.0106

Gnomad4 FIN AF: 0.0164

Gnomad4 NFE AF: 0.0365

Gnomad4 OTH AF: 0.0313

Alfa AF: 0.0350 Hom.: 29

Bravo AF: 0.0252

Asia WGS AF: 0.00722 AC: 25 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	9.3
DANN	Benign	0.78

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: rs55916387; hg19: chr18-31246244;