chr4-16023380-G-T

Variant names:

• chr4-16023380-G-T
• rs373331232
• NM_006017.3:c.730C>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_006017.3(PROM1):​c.730C>A​(p.Arg244Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PROM1 NM_006017.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.906
• Publications: 6 publications found

Genes affected

PROM1 (HGNC:9454): (prominin 1) This gene encodes a pentaspan transmembrane glycoprotein. The protein localizes to membrane protrusions and is often expressed on adult stem cells, where it is thought to function in maintaining stem cell properties by suppressing differentiation. Mutations in this gene have been shown to result in retinitis pigmentosa and Stargardt disease. Expression of this gene is also associated with several types of cancer. This gene is expressed from at least five alternative promoters that are expressed in a tissue-dependent manner. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Mar 2009]

PROM1 Gene-Disease associations (from GenCC):

• retinal macular dystrophy type 2

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• inherited retinal dystrophy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• retinitis pigmentosa 41

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• cone-rod dystrophy 12

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• cone-rod dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• retinitis pigmentosa

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Stargardt disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).
• BP7: Synonymous conserved (PhyloP=0.906 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006017.3. 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
	PROM1	NM_006017.3	MANE Select	c.730C>A	p.Arg244Arg	synonymous	Exon 8 of 28	NP_006008.1
	PROM1	NM_001145847.2		c.703C>A	p.Arg235Arg	synonymous	Exon 7 of 27	NP_001139319.1
	PROM1	NM_001145848.2		c.703C>A	p.Arg235Arg	synonymous	Exon 7 of 27	NP_001139320.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PROM1	ENST00000447510.7	TSL:1 MANE Select	c.730C>A	p.Arg244Arg	synonymous	Exon 8 of 28	ENSP00000415481.2
	PROM1	ENST00000505450.5	TSL:1	c.703C>A	p.Arg235Arg	synonymous	Exon 7 of 27	ENSP00000426090.1
	PROM1	ENST00000508167.5	TSL:1	c.703C>A	p.Arg235Arg	synonymous	Exon 7 of 27	ENSP00000427346.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1454948 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 723048

African (AFR) AF: 0.00 AC: 0 AN: 33380

American (AMR) AF: 0.00 AC: 0 AN: 43924

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25926

East Asian (EAS) AF: 0.00 AC: 0 AN: 39516

South Asian (SAS) AF: 0.00 AC: 0 AN: 84732

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53094

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5756

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1108452

Other (OTH) AF: 0.00 AC: 0 AN: 60168

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	3.3
DANN	Benign	0.52
PhyloP100		0.91

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs373331232; hg19: chr4-16025003;