chr7-84134797-T-G

Variant names:

• chr7-84134797-T-G
• rs74349534
• NM_006080.3:c.267A>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.267A>C​(p.Gln89His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,455,994 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict 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. Q89E) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: SEMA3A NM_006080.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.78
• 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=0.1872099).

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.267A>C	p.Gln89His	missense	Exon 2 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.267A>C	p.Gln89His	missense	Exon 2 of 17	ENSP00000265362.3
	SEMA3A	ENST00000436949.5	TSL:5	c.267A>C	p.Gln89His	missense	Exon 3 of 18	ENSP00000415260.1
	SEMA3A	ENST00000420047.1	TSL:4	c.267A>C	p.Gln89His	missense	Exon 3 of 5	ENSP00000391900.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1455994 Hom.: 0 Cov.: 30 AF XY: 0.00000276 AC XY: 2 AN XY: 724442

African (AFR) AF: 0.00 AC: 0 AN: 33216

American (AMR) AF: 0.00 AC: 0 AN: 44002

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25952

East Asian (EAS) AF: 0.00 AC: 0 AN: 39500

South Asian (SAS) AF: 0.00 AC: 0 AN: 85516

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53310

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5738

European-Non Finnish (NFE) AF: 0.00000180 AC: 2 AN: 1108620

Other (OTH) AF: 0.00 AC: 0 AN: 60140

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.12	T
Eigen	Benign	-0.26
Eigen_PC	Benign	-0.12
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.0063	T
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.82	L
PhyloP100		1.8
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-0.95	N
REVEL	Benign	0.091
Sift	Benign	0.11	T
Sift4G	Benign	0.11	T
Polyphen		0.0030	B
Vest4		0.47
MutPred		0.61		Gain of ubiquitination at K90 (P = 0.1128)
MVP		0.35
MPC		0.63
ClinPred		0.41	T
GERP RS		3.6
Varity_R		0.072
gMVP		0.63
Mutation Taster		=87/13	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: rs74349534; hg19: chr7-83764113;