2-197516127-G-T

Variant names:

• chr2-197516127-G-T
• rs771887364
• NM_015387.5:c.41G>T

Variant summary

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

The NM_015387.5(MOB4):​c.41G>T​(p.Arg14Met) variant causes a missense change. The variant allele was found at a frequency of 0.000000689 in 1,452,336 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. R14K) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: MOB4 NM_015387.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.26
• Publications: 0 publications found

Genes affected

MOB4 (HGNC:17261): (MOB family member 4, phocein) This gene was identified based on its similarity with the mouse counterpart. Studies of the mouse counterpart suggest that the expression of this gene may be regulated during oocyte maturation and preimplantation following zygotic gene activation. Alternatively spliced transcript variants encoding distinct isoforms have been observed. Naturally occurring read-through transcription occurs between this locus and the neighboring locus HSPE1.[provided by RefSeq, Feb 2011]

HSPE1-MOB4 (HGNC:49184): (HSPE1-MOB4 readthrough) This locus represents naturally occurring read-through transcription between the neighboring HSPE1 (heat shock 10kDa protein 1 (chaperonin 10)) and MOB4 (MOB family member 4, phocein) genes on chromosome 2. The read-through transcript produces a fusion protein that shares sequence identity with each individual gene product. [provided by RefSeq, Oct 2011]

HSPD1 (HGNC:5261): (heat shock protein family D (Hsp60) member 1) This gene encodes a member of the chaperonin family. The encoded mitochondrial protein may function as a signaling molecule in the innate immune system. This protein is essential for the folding and assembly of newly imported proteins in the mitochondria. This gene is adjacent to a related family member and the region between the 2 genes functions as a bidirectional promoter. Several pseudogenes have been associated with this gene. Two transcript variants encoding the same protein have been identified for this gene. Mutations associated with this gene cause autosomal recessive spastic paraplegia 13. [provided by RefSeq, Jun 2010]

HSPD1 Gene-Disease associations (from GenCC):

• hereditary spastic paraplegia 13

  Inheritance: AD Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• hypomyelinating leukodystrophy 4

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet, Ambry Genetics

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_015387.5. 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
	MOB4	NM_015387.5	MANE Select	c.41G>T	p.Arg14Met	missense	Exon 1 of 8	NP_056202.2
	MOB4	NM_001100819.3		c.41G>T	p.Arg14Met	missense	Exon 1 of 7	NP_001094289.1	Q9Y3A3-3
	HSPE1-MOB4	NM_001202485.2		c.169-7497G>T		intron	N/A	NP_001189414.1	S4R3N1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MOB4	ENST00000323303.9	TSL:1 MANE Select	c.41G>T	p.Arg14Met	missense	Exon 1 of 8	ENSP00000315702.4	Q9Y3A3-1
	HSPE1-MOB4	ENST00000604458.1	TSL:3	c.169-7497G>T		intron	N/A	ENSP00000474534.1	S4R3N1
	MOB4	ENST00000233892.8	TSL:1	c.-37+443G>T		intron	N/A	ENSP00000233892.4	Q9Y3A3-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.89e-7 AC: 1 AN: 1452336 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 721706

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 32948

American (AMR) AF: 0.0000231 AC: 1 AN: 43308

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25718

East Asian (EAS) AF: 0.00 AC: 0 AN: 39082

South Asian (SAS) AF: 0.00 AC: 0 AN: 84340

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52582

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5744

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1108620

Other (OTH) AF: 0.00 AC: 0 AN: 59994

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
CADD	Pathogenic	30
DANN	Benign	0.96
DEOGEN2	Benign	0.40	T
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.91	D
M_CAP	Pathogenic	0.81	D
MetaRNN	Uncertain	0.70	D
MetaSVM	Uncertain	-0.16	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		6.3
PROVEAN	Uncertain	-3.1	D
REVEL	Pathogenic	0.70
Sift	Uncertain	0.021	D
Sift4G	Benign	0.080	T
Polyphen		0.83	P
Vest4		0.59
MutPred		0.42		Loss of MoRF binding (P = 0.0275)
MVP		0.33
MPC		1.9
ClinPred		0.99	D
GERP RS		4.6
PromoterAI		-0.045	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.51
gMVP		0.67
Mutation Taster		=52/48	polymorphism

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: rs771887364; hg19: chr2-198380851;