NM_020631.6:c.2691C>T

Variant names:

• chr1-6468145-G-A
• rs755539639
• NM_020631.6:c.2691C>T

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_Strong BP6 BP7

The NM_020631.6(PLEKHG5):​c.2691C>T​(p.Ala897Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000154 in 1,571,222 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 Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. A897A) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000072 (0 hom., cov: 33)
  • Exomes 𝑓: 0.00016 (0 hom.)
• Consequence: PLEKHG5 NM_020631.6 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:3
• Conservation: PhyloP100: -0.427
• Publications: 0 publications found

Genes affected

PLEKHG5 (HGNC:29105): (pleckstrin homology and RhoGEF domain containing G5) This gene encodes a protein that activates the nuclear factor kappa B (NFKB1) signaling pathway. Mutations in this gene are associated with autosomal recessive distal spinal muscular atrophy. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2012]

PLEKHG5 Gene-Disease associations (from GenCC):

• neuromuscular disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Charcot-Marie-Tooth disease recessive intermediate C

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), Ambry Genetics
• neuronopathy, distal hereditary motor, autosomal recessive 4

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

ACMG classification

Our verdict: Likely_benign. The variant received -6 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.65).
• BP6: Variant 1-6468145-G-A is Benign according to our data. Variant chr1-6468145-G-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 297936.
• BP7: Synonymous conserved (PhyloP=-0.427 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020631.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PLEKHG5	NM_020631.6	MANE Select	c.2691C>T	p.Ala897Ala	synonymous	Exon 20 of 21	NP_065682.2
	PLEKHG5	NM_001265593.2		c.2898C>T	p.Ala966Ala	synonymous	Exon 20 of 21	NP_001252522.1
	PLEKHG5	NM_001042663.3		c.2802C>T	p.Ala934Ala	synonymous	Exon 21 of 22	NP_001036128.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PLEKHG5	ENST00000377728.8	TSL:2 MANE Select	c.2691C>T	p.Ala897Ala	synonymous	Exon 20 of 21	ENSP00000366957.3
	PLEKHG5	ENST00000377732.5	TSL:1	c.2802C>T	p.Ala934Ala	synonymous	Exon 20 of 21	ENSP00000366961.1
	PLEKHG5	ENST00000400915.8	TSL:1	c.2802C>T	p.Ala934Ala	synonymous	Exon 21 of 22	ENSP00000383706.4

Frequencies

GnomAD3 genomes AF: 0.0000723 AC: 11 AN: 152246 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000132

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000194 AC: 4 AN: 206416 AF XY: 0.00000890

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000430

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000163 AC: 231 AN: 1418976 Hom.: 0 Cov.: 32 AF XY: 0.000141 AC XY: 99 AN XY: 700712

African (AFR) AF: 0.000123 AC: 4 AN: 32442

American (AMR) AF: 0.00 AC: 0 AN: 40770

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 23112

East Asian (EAS) AF: 0.00 AC: 0 AN: 39244

South Asian (SAS) AF: 0.00 AC: 0 AN: 79478

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 50114

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5514

European-Non Finnish (NFE) AF: 0.000201 AC: 219 AN: 1089978

Other (OTH) AF: 0.000137 AC: 8 AN: 58324

GnomAD4 genome AF: 0.0000723 AC: 11 AN: 152246 Hom.: 0 Cov.: 33 AF XY: 0.0000672 AC XY: 5 AN XY: 74370

African (AFR) AF: 0.0000241 AC: 1 AN: 41468

American (AMR) AF: 0.0000654 AC: 1 AN: 15292

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000132 AC: 9 AN: 68040

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000718

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	-	1	Inborn genetic diseases (1)
-	1	-	Neuronopathy, distal hereditary motor, autosomal recessive 4 (1)
-	-	1	Neuronopathy, distal hereditary motor, autosomal recessive 4;C3809309:Charcot-Marie-Tooth disease recessive intermediate C (1)
-	-	1	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.65
CADD	Benign	1.9
DANN	Benign	0.57
PhyloP100		-0.43
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs755539639; hg19: chr1-6528205;