chr6-100390543-C-A

Variant names:

• chr6-100390543-C-A
• rs74726213
• NM_005068.3:c.2119G>T

Variant summary

Our verdict is Uncertain significance. The variant received 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
• Publications: 8 publications found

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]

SIM1 Gene-Disease associations (from GenCC):

• obesity due to SIM1 deficiency

  Inheritance: AD, AR Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
• complex neurodevelopmental disorder

  Inheritance: AD Classification: STRONG Submitted by: Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005068.3. 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
	SIM1	NM_005068.3	MANE Select	c.2119G>T	p.Asp707Tyr	missense	Exon 12 of 12	NP_005059.2
	SIM1	NM_001374769.1		c.2119G>T	p.Asp707Tyr	missense	Exon 12 of 12	NP_001361698.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIM1	ENST00000369208.8	TSL:1 MANE Select	c.2119G>T	p.Asp707Tyr	missense	Exon 12 of 12	ENSP00000358210.4
	SIM1	ENST00000262901.4	TSL:1	c.2119G>T	p.Asp707Tyr	missense	Exon 11 of 11	ENSP00000262901.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

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
Eigen	Pathogenic	0.71
Eigen_PC	Pathogenic	0.78
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.89	D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.75	D
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.81	L
PhyloP100		7.6
PrimateAI	Uncertain	0.77	T
PROVEAN	Benign	-0.96	N
REVEL	Uncertain	0.38
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0060	D
Polyphen		1.0	D
Vest4		0.64
MutPred		0.72		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
Mutation Taster		=21/79	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: rs74726213; hg19: chr6-100838419;