chr8-23298846-G-C

Position:

• chr8-23298846-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_002318.3(LOXL2):​c.2235C>G​(p.Asn745Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: LOXL2 NM_002318.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.92

Genes affected

LOXL2 (HGNC:6666): (lysyl oxidase like 2) This gene encodes a member of the lysyl oxidase gene family. The prototypic member of the family is essential to the biogenesis of connective tissue, encoding an extracellular copper-dependent amine oxidase that catalyses the first step in the formation of crosslinks in collagens and elastin. A highly conserved amino acid sequence at the C-terminus end appears to be sufficient for amine oxidase activity, suggesting that each family member may retain this function. The N-terminus is poorly conserved and may impart additional roles in developmental regulation, senescence, tumor suppression, cell growth control, and chemotaxis to each member of the family. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.794

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LOXL2	NM_002318.3	c.2235C>G	p.Asn745Lys	missense_variant	13/14	ENST00000389131.8	NP_002309.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LOXL2	ENST00000389131.8	c.2235C>G	p.Asn745Lys	missense_variant	13/14	1	NM_002318.3	ENSP00000373783	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 02, 2024

The c.2235C>G (p.N745K) alteration is located in exon 13 (coding exon 12) of the LOXL2 gene. This alteration results from a C to G substitution at nucleotide position 2235, causing the asparagine (N) at amino acid position 745 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.45
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Benign	0.17	T
Eigen	Benign	-0.11
Eigen_PC	Benign	-0.036
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.85	D
M_CAP	Benign	0.016	T
MetaRNN	Pathogenic	0.79	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.6	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.52	T
PROVEAN	Uncertain	-3.6	D
REVEL	Benign	0.11
Sift	Benign	0.035	D
Sift4G	Uncertain	0.055	T
Polyphen		0.099	B
Vest4		0.82
MutPred		0.79		Gain of methylation at N745 (P = 6e-04);
MVP		0.40
MPC		0.52
ClinPred		0.98	D
GERP RS		1.9
Varity_R		0.49
gMVP		0.74

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

Publications

LitVar

Other links and lift over

dbSNP: rs1803080292; hg19: chr8-23156359;