16-67944001-G-C

Variant names:

• chr16-67944001-G-C
• rs121908051
• NM_000229.2:c.101C>G

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PM5 PP3_Moderate

The NM_000229.2(LCAT):​c.101C>G​(p.Pro34Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000143 in 1,395,980 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P34L) has been classified as Pathogenic.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: LCAT NM_000229.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.40
• Publications: 7 publications found

Genes affected

LCAT (HGNC:6522): (lecithin-cholesterol acyltransferase) This gene encodes the extracellular cholesterol esterifying enzyme, lecithin-cholesterol acyltransferase. The esterification of cholesterol is required for cholesterol transport. Mutations in this gene have been found to cause fish-eye disease as well as LCAT deficiency. [provided by RefSeq, Jul 2008]

SLC12A4 (HGNC:10913): (solute carrier family 12 member 4) This gene encodes a member of the SLC12A transporter family. The encoded protein mediates the coupled movement of potassium and chloride ions across the plasma membrane. This gene is expressed ubiquitously. Multiple alternatively spliced transcript variants encoding distinct isoforms have been found for this gene. [provided by RefSeq, Jan 2013]

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr16-67944001-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 3662.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.862

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000229.2. 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
	LCAT	NM_000229.2	MANE Select	c.101C>G	p.Pro34Arg	missense	Exon 1 of 6	NP_000220.1	P04180
	SLC12A4	NM_005072.5	MANE Select	c.*839C>G		3_prime_UTR	Exon 24 of 24	NP_005063.1	Q9UP95-1
	SLC12A4	NM_001145962.1		c.*839C>G		3_prime_UTR	Exon 23 of 23	NP_001139434.1	Q9UP95-7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LCAT	ENST00000264005.10	TSL:1 MANE Select	c.101C>G	p.Pro34Arg	missense	Exon 1 of 6	ENSP00000264005.5	P04180
	SLC12A4	ENST00000316341.8	TSL:1 MANE Select	c.*839C>G		3_prime_UTR	Exon 24 of 24	ENSP00000318557.3	Q9UP95-1
	LCAT	ENST00000575467.5	TSL:5	n.101C>G		non_coding_transcript_exon	Exon 1 of 6	ENSP00000460653.1	I3L3R0

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000143 AC: 2 AN: 1395980 Hom.: 0 Cov.: 32 AF XY: 0.00000145 AC XY: 1 AN XY: 688330

African (AFR) AF: 0.00 AC: 0 AN: 31550

American (AMR) AF: 0.00 AC: 0 AN: 35594

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25114

East Asian (EAS) AF: 0.00 AC: 0 AN: 35694

South Asian (SAS) AF: 0.00 AC: 0 AN: 78998

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48578

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4972

European-Non Finnish (NFE) AF: 0.00000186 AC: 2 AN: 1077690

Other (OTH) AF: 0.00 AC: 0 AN: 57790

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000295 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.37
BayesDel_addAF	Pathogenic	0.49	D
BayesDel_noAF	Pathogenic	0.47
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.38	T
Eigen	Uncertain	0.60
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Benign	0.81	T
M_CAP	Uncertain	0.23	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Pathogenic	0.88	D
MutationAssessor	Uncertain	2.3	M
PhyloP100		6.4
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	-2.1	N
REVEL	Pathogenic	0.83
Sift	Uncertain	0.0090	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.80
MutPred		0.69		Loss of catalytic residue at P33 (P = 0.016)
MVP		0.98
MPC		1.3
ClinPred		0.96	D
GERP RS		5.1
PromoterAI		-0.0050	Neutral
Varity_R		0.33
gMVP		0.83
Mutation Taster		=10/90	disease causing

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: rs121908051; hg19: chr16-67977904;