chr6-100447468-C-G

Variant names:

• chr6-100447468-C-G
• rs397662
• NM_005068.3:c.851-53G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005068.3(SIM1):​c.851-53G>C variant causes a intron change involving the alteration of a non-conserved nucleotide. 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.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SIM1 NM_005068.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.958
• Publications: 11 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
• inherited obesity

  Inheritance: AD Classification: STRONG Submitted by: PanelApp Australia

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIM1	NM_005068.3	MANE Select	c.851-53G>C		intron	N/A	NP_005059.2
	SIM1	NM_001374769.1		c.851-53G>C		intron	N/A	NP_001361698.1	P81133

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIM1	ENST00000369208.8	TSL:1 MANE Select	c.851-53G>C		intron	N/A	ENSP00000358210.4	P81133
	SIM1	ENST00000262901.4	TSL:1	c.851-53G>C		intron	N/A	ENSP00000262901.4	P81133
	SIM1	ENST00000900753.1		c.851-53G>C		intron	N/A	ENSP00000570812.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1456486 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 724164

African (AFR) AF: 0.00 AC: 0 AN: 33406

American (AMR) AF: 0.00 AC: 0 AN: 44346

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25848

East Asian (EAS) AF: 0.00 AC: 0 AN: 39612

South Asian (SAS) AF: 0.00 AC: 0 AN: 85648

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53030

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5754

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1108646

Other (OTH) AF: 0.00 AC: 0 AN: 60196

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 89425

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	0.59
DANN	Benign	0.25
PhyloP100		-0.96

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs397662; hg19: chr6-100895344;