chrX-24960905-A-G

Variant names:

• chrX-24960905-A-G
• rs11573502
• NM_001330360.2:c.4261+30356A>G

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The NM_001330360.2(POLA1):​c.4261+30356A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000445 in 112,400 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 3 hemizygotes in GnomAD. 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 0.000044 (0 hom., 3 hem., cov: 23)
• Consequence: POLA1 NM_001330360.2 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.487
• Publications: 0 publications found

Genes affected

POLA1 (HGNC:9173): (DNA polymerase alpha 1, catalytic subunit) This gene encodes the catalytic subunit of DNA polymerase, which together with a regulatory and two primase subunits, forms the DNA polymerase alpha complex. The catalytic subunit plays an essential role in the initiation of DNA replication. [provided by RefSeq, Mar 2010]

POLA1 Gene-Disease associations (from GenCC):

• X-linked intellectual disability, van Esch type

  Inheritance: XL Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), G2P, Orphanet
• X-linked reticulate pigmentary disorder

  Inheritance: XL Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BS1: Variant frequency is greater than expected in population amr. GnomAd4 allele frequency = 0.0000445 (5/112400) while in subpopulation AMR AF = 0.000377 (4/10611). AF 95% confidence interval is 0.000128. There are 0 homozygotes in GnomAd4. There are 3 alleles in the male GnomAd4 subpopulation. Median coverage is 23. This position passed quality control check.
• BS2: High Hemizygotes in GnomAd4 at 3 XL gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
POLA1	NM_001330360.2	c.4261+30356A>G		intron_variant	Intron 36 of 36	ENST00000379068.8	NP_001317289.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
POLA1	ENST00000379068.8	c.4261+30356A>G		intron_variant	Intron 36 of 36	5	NM_001330360.2	ENSP00000368358.3

Frequencies

GnomAD3 genomes AF: 0.0000445 AC: 5 AN: 112348 Hom.: 0 Cov.: 23

Gnomad AFR AF: 0.0000323

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000377

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

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

GnomAD4 genome AF: 0.0000445 AC: 5 AN: 112400 Hom.: 0 Cov.: 23 AF XY: 0.0000868 AC XY: 3 AN XY: 34548

African (AFR) AF: 0.0000322 AC: 1 AN: 31044

American (AMR) AF: 0.000377 AC: 4 AN: 10611

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 2642

East Asian (EAS) AF: 0.00 AC: 0 AN: 3589

South Asian (SAS) AF: 0.00 AC: 0 AN: 2651

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 6107

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 218

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 53317

Other (OTH) AF: 0.00 AC: 0 AN: 1537

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000567

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	6.5
DANN	Benign	0.79
PhyloP100		-0.49

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

Other links and lift over

dbSNP: rs11573502; hg19: chrX-24979022;