NM_030805.4:c.731_732delGCinsTT

Variant names:

• chr2-96711708-GC-AA
• NM_030805.4:c.731_732delGCinsTT
• LMAN2L p.Arg244Leu

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 0P and 0B.

The NM_030805.4(LMAN2L):​c.731_732delGCinsTT​(p.Arg244Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R244H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: LMAN2L NM_030805.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.760
• Publications: 0 publications found

Genes affected

LMAN2L (HGNC:19263): (lectin, mannose binding 2 like) This gene encodes a protein belonging to the L-type lectin group of type 1 membrane proteins, which function in the mammalian early secretory pathway. These proteins contain luminal carbohydrate recognition domains, which display homology to leguminous lectins. Unlike other proteins of the group, which cycle in the early secretory pathway and are predominantly associated with post endoplasmic reticulum membranes, the protein encoded by this gene is a non-cycling resident protein of the ER, where it functions as a cargo receptor for glycoproteins. It is proposed to regulate exchange of folded proteins for transport to the Golgi and exchange of misfolded glycoproteins for transport to the ubiquitin-proteasome pathway. [provided by RefSeq, Apr 2016]

LMAN2L Gene-Disease associations (from GenCC):

• autosomal recessive non-syndromic intellectual disability

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• complex neurodevelopmental disorder

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
• intellectual developmental disorder, autosomal dominant 69

  Inheritance: AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
• intellectual disability, autosomal recessive 52

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_030805.4. 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
	LMAN2L	NM_030805.4	MANE Select	c.731_732delGCinsTT	p.Arg244Leu	missense	N/A	NP_110432.1	Q9H0V9-1
	LMAN2L	NM_001142292.2		c.764_765delGCinsTT	p.Arg255Leu	missense	N/A	NP_001135764.1	Q9H0V9-2
	LMAN2L	NM_001322347.2		c.350_351delGCinsTT	p.Arg117Leu	missense	N/A	NP_001309276.1	B4DI83

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LMAN2L	ENST00000264963.9	TSL:1 MANE Select	c.731_732delGCinsTT	p.Arg244Leu	missense	N/A	ENSP00000264963.4	Q9H0V9-1
	LMAN2L	ENST00000377079.8	TSL:1	c.764_765delGCinsTT	p.Arg255Leu	missense	N/A	ENSP00000366280.4	Q9H0V9-2
	LMAN2L	ENST00000970314.1		c.770_771delGCinsTT	p.Arg257Leu	missense	N/A	ENSP00000640373.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.76

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr2-97377445;