chr5-139378470-G-T

Variant names:

• chr5-139378470-G-T
• rs4257763
• NM_005847.5:c.1179+109C>A

Variant summary

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

The NM_005847.5(SLC23A1):​c.1179+109C>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000157 in 1,273,702 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: not found (cov: 32)
  • Exomes 𝑓: 0.0000016 (0 hom.)
• Consequence: SLC23A1 NM_005847.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.369
• Publications: 0 publications found

Genes affected

SLC23A1 (HGNC:10974): (solute carrier family 23 member 1) The absorption of vitamin C into the body and its distribution to organs requires two sodium-dependent vitamin C transporters. This gene encodes one of the two transporters. The encoded protein is active in bulk vitamin C transport involving epithelial surfaces. Previously, this gene had an official symbol of SLC23A2. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2008]

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=-0.84).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005847.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC23A1	NM_005847.5	MANE Select	c.1179+109C>A		intron	N/A	NP_005838.3
	SLC23A1	NM_152685.4		c.1191+109C>A		intron	N/A	NP_689898.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC23A1	ENST00000348729.8	TSL:1 MANE Select	c.1179+109C>A		intron	N/A	ENSP00000302701.4
	SLC23A1	ENST00000353963.7	TSL:1	c.1191+109C>A		intron	N/A	ENSP00000302851.5
	SLC23A1	ENST00000504513.1	TSL:5	c.*121C>A		downstream_gene	N/A	ENSP00000422688.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000157 AC: 2 AN: 1273702 Hom.: 0 Cov.: 19 AF XY: 0.00000158 AC XY: 1 AN XY: 630978

African (AFR) AF: 0.00 AC: 0 AN: 29328

American (AMR) AF: 0.00 AC: 0 AN: 34404

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23022

East Asian (EAS) AF: 0.00 AC: 0 AN: 35098

South Asian (SAS) AF: 0.00 AC: 0 AN: 74456

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48128

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3780

European-Non Finnish (NFE) AF: 0.00000206 AC: 2 AN: 972092

Other (OTH) AF: 0.00 AC: 0 AN: 53394

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	0.34
DANN	Benign	0.89
PhyloP100		0.37
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs4257763; hg19: chr5-138714159;