NM_002340.6:c.2196C>G

Variant names:

• chr21-46191107-G-C
• rs200216586
• NM_002340.6:c.2196C>G

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_002340.6(LSS):​c.2196C>G​(p.Pro732Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,770 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★). Synonymous variant affecting the same amino acid position (i.e. P732P) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: LSS NM_002340.6 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.549
• Publications: 0 publications found

Genes affected

LSS (HGNC:6708): (lanosterol synthase) The protein encoded by this gene catalyzes the conversion of (S)-2,3 oxidosqualene to lanosterol. The encoded protein is a member of the terpene cyclase/mutase family and catalyzes the first step in the biosynthesis of cholesterol, steroid hormones, and vitamin D. Alternative splicing results in multiple transcript variants encoding different isoforms.[provided by RefSeq, Feb 2009]

LSS Gene-Disease associations (from GenCC):

• alopecia-intellectual disability syndrome 4

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• cataract 44

  Inheritance: AR Classification: STRONG, LIMITED Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• hypotrichosis 14

  Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics
• hypotrichosis simplex

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• total early-onset cataract

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal recessive palmoplantar keratoderma and congenital alopecia

  Inheritance: AR Classification: LIMITED Submitted by: G2P

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP6: Variant 21-46191107-G-C is Benign according to our data. Variant chr21-46191107-G-C is described in ClinVar as Likely_benign. ClinVar VariationId is 3389812.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-0.549 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002340.6. 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
	LSS	NM_002340.6	MANE Select	c.2196C>G	p.Pro732Pro	synonymous	Exon 22 of 22	NP_002331.3
	LSS	NM_001001438.3		c.2196C>G	p.Pro732Pro	synonymous	Exon 22 of 23	NP_001001438.1	P48449-1
	LSS	NM_001145436.2		c.2163C>G	p.Pro721Pro	synonymous	Exon 22 of 22	NP_001138908.1	P48449-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LSS	ENST00000397728.8	TSL:1 MANE Select	c.2196C>G	p.Pro732Pro	synonymous	Exon 22 of 22	ENSP00000380837.2	P48449-1
	LSS	ENST00000356396.8	TSL:1	c.2196C>G	p.Pro732Pro	synonymous	Exon 22 of 23	ENSP00000348762.3	P48449-1
	LSS	ENST00000457828.6	TSL:1	c.1956C>G	p.Pro652Pro	synonymous	Exon 21 of 21	ENSP00000409191.2	P48449-2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461770 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727176

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44720

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53356

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 0.00000450 AC: 5 AN: 1111990

Other (OTH) AF: 0.00 AC: 0 AN: 60386

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	2.4
DANN	Benign	0.75
PhyloP100		-0.55

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs200216586; hg19: chr21-47611021;