4-150490928-C-A

Variant names:

• chr4-150490928-C-A
• NM_001364905.1:c.6438G>T
• LRBA p.Met2146Ile

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001364905.1(LRBA):​c.6438G>T​(p.Met2146Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 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.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: LRBA NM_001364905.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.81
• Publications: 0 publications found

Genes affected

LRBA (HGNC:1742): (LPS responsive beige-like anchor protein) The protein encoded by this gene is a member of the WDL-BEACH-WD (WBW) gene family. Its expression is induced in B cells and macrophages by bacterial lipopolysaccharides (LPS). The encoded protein associates with protein kinase A and may be involved in leading intracellular vesicles to activated receptor complexes, which aids in the secretion and/or membrane deposition of immune effector molecules. Defects in this gene are associated with the disorder common variable immunodeficiency-8 with autoimmunity. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]

LRBA Gene-Disease associations (from GenCC):

• combined immunodeficiency due to LRBA deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp, Orphanet, G2P, ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001364905.1. 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
	LRBA	NM_001364905.1	MANE Select	c.6438G>T	p.Met2146Ile	missense	Exon 41 of 57	NP_001351834.1	A0A494C1L5
	LRBA	NM_001440430.1		c.6471G>T	p.Met2157Ile	missense	Exon 42 of 58	NP_001427359.1
	LRBA	NM_006726.5		c.6471G>T	p.Met2157Ile	missense	Exon 42 of 58	NP_006717.2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LRBA	ENST00000651943.2	MANE Select	c.6438G>T	p.Met2146Ile	missense	Exon 41 of 57	ENSP00000498582.2	A0A494C1L5
	LRBA	ENST00000357115.9	TSL:1	c.6471G>T	p.Met2157Ile	missense	Exon 42 of 58	ENSP00000349629.3	P50851-1
	LRBA	ENST00000510413.5	TSL:1	c.6438G>T	p.Met2146Ile	missense	Exon 41 of 57	ENSP00000421552.1	P50851-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0;AS_VQSR AF: 0.00 AC: 0 AN: 1444354 Hom.: 0 Cov.: 27 AF XY: 0.00 AC XY: 0 AN XY: 719280

African (AFR) AF: 0.00 AC: 0 AN: 33156

American (AMR) AF: 0.00 AC: 0 AN: 44488

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25810

East Asian (EAS) AF: 0.00 AC: 0 AN: 39446

South Asian (SAS) AF: 0.00 AC: 0 AN: 84730

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53058

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5710

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1098298

Other (OTH) AF: 0.00 AC: 0 AN: 59658

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.79
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.050	T
Eigen	Uncertain	0.50
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.96	D
M_CAP	Benign	0.045	D
MetaRNN	Uncertain	0.70	D
MetaSVM	Benign	-0.34	T
MutationAssessor	Uncertain	2.6	M
PhyloP100		7.8
PrimateAI	Uncertain	0.68	T
PROVEAN	Benign	-2.4	N
REVEL	Uncertain	0.30
Sift	Uncertain	0.012	D
Sift4G	Uncertain	0.015	D
Varity_R		0.69
gMVP		0.74
Mutation Taster		=41/59	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

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

Other links and lift over

hg19: chr4-151412080;