rs74726213

chr6-100390543-C-Achr6-100390543-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_005068.3(SIM1):c.2119G>T(p.Asp707Tyr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic 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. D707H) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SIM1 NM_005068.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.57

Genes affected

SIM1 (HGNC:10882): (SIM bHLH transcription factor 1) SIM1 and SIM2 genes are Drosophila single-minded (sim) gene homologs. SIM1 transcript was detected only in fetal kidney out of various adult and fetal tissues tested. Since the sim gene plays an important role in Drosophila development and has peak levels of expression during the period of neurogenesis,it was proposed that the human SIM gene is a candidate for involvement in certain dysmorphic features (particularly the facial and skull characteristics), abnormalities of brain development, and/or cognitive disability of Down syndrome. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.751

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIM1	NM_005068.3	c.2119G>T	p.Asp707Tyr	missense_variant	12/12	ENST00000369208.8
SIM1	NM_001374769.1	c.2119G>T	p.Asp707Tyr	missense_variant	12/12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SIM1	ENST00000369208.8	c.2119G>T	p.Asp707Tyr	missense_variant	12/12	1	NM_005068.3	P1
SIM1	ENST00000262901.4	c.2119G>T	p.Asp707Tyr	missense_variant	11/11	1		P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.72
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.0
Cadd	Pathogenic	28
Dann	Uncertain	1.0
DEOGEN2	Benign	0.15	T;T
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.78
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.75	D;D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.81	L;L
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.77	T
PROVEAN	Benign	-0.96	N;N
REVEL	Uncertain	0.38
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.0060	D;D
Polyphen		1.0	D;D
Vest4		0.64
MutPred		0.72		Gain of sheet (P = 0.0266);Gain of sheet (P = 0.0266);
MVP		0.23
MPC		0.19
ClinPred		0.94	D
GERP RS		6.2
Varity_R		0.17
gMVP		0.77

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

Publications

LitVar

Other links and lift over

dbSNP: rs74726213; hg19: chr6-100838419;