7-83961489-C-G

Variant names:

• chr7-83961489-C-G
• rs318240753
• NM_006080.3:c.2198G>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_006080.3(SEMA3A):​c.2198G>C​(p.Arg733Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 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. R733H) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SEMA3A NM_006080.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.69
• Publications: 0 publications found

Genes affected

SEMA3A (HGNC:10723): (semaphorin 3A) This gene is a member of the semaphorin family and encodes a protein with an Ig-like C2-type (immunoglobulin-like) domain, a PSI domain and a Sema domain. This secreted protein can function as either a chemorepulsive agent, inhibiting axonal outgrowth, or as a chemoattractive agent, stimulating the growth of apical dendrites. In both cases, the protein is vital for normal neuronal pattern development. Increased expression of this protein is associated with schizophrenia and is seen in a variety of human tumor cell lines. Also, aberrant release of this protein is associated with the progression of Alzheimer's disease. [provided by RefSeq, Jul 2008]

SEMA3A Gene-Disease associations (from GenCC):

• skeletal dysplasia

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• hypogonadotropic hypogonadism 16 with or without anosmia

  Inheritance: AD Classification: STRONG, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• multiple congenital anomalies/dysmorphic syndrome

  Inheritance: AR Classification: MODERATE Submitted by: Ambry Genetics
• Brugada syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Kallmann syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.15629119).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006080.3. 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
	SEMA3A	NM_006080.3	MANE Select	c.2198G>C	p.Arg733Pro	missense	Exon 17 of 17	NP_006071.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SEMA3A	ENST00000265362.9	TSL:1 MANE Select	c.2198G>C	p.Arg733Pro	missense	Exon 17 of 17	ENSP00000265362.3
	SEMA3A	ENST00000436949.5	TSL:5	c.2198G>C	p.Arg733Pro	missense	Exon 18 of 18	ENSP00000415260.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.53
BayesDel_addAF	Benign	-0.091	T
BayesDel_noAF	Benign	-0.37
CADD	Uncertain	25
DANN	Benign	0.95
DEOGEN2	Benign	0.19	T
Eigen	Benign	-0.034
Eigen_PC	Benign	0.21
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.6	L
PhyloP100		4.7
PrimateAI	Uncertain	0.73	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.13
Sift	Benign	0.36	T
Sift4G	Benign	0.29	T
Polyphen		0.0060	B
Vest4		0.38
MutPred		0.38		Gain of glycosylation at R733 (P = 0.0162)
MVP		0.27
MPC		0.99
ClinPred		0.81	D
GERP RS		6.1
Varity_R		0.38
gMVP		0.50
Mutation Taster		=42/58	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

Other links and lift over

dbSNP: rs318240753; hg19: chr7-83590805;