chr9-27548435-G-GAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAATTAAAAAAAAAAAAATAAAAAA

Variant names:

• chr9-27548435-G-GAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAATTAAAAAAAAAAAAATAAAAAA
• rs11292923
• NM_018325.5:c.1260-14_1260-13insTTTTTTATTTTTTTTTTTTTAATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT

Variant summary

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

The NM_018325.5(C9orf72):​c.1260-14_1260-13insTTTTTTATTTTTTTTTTTTTAATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT variant causes a intron change involving the alteration of a non-conserved nucleotide. It is difficult to determine the true allele frequency of this variant because it is of type INS_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.000054 (1 hom., cov: 0)
• Consequence: C9orf72 NM_018325.5 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.242
• Publications: 1 publications found

Genes affected

C9orf72 (HGNC:28337): (C9orf72-SMCR8 complex subunit) The protein encoded by this gene plays an important role in the regulation of endosomal trafficking, and has been shown to interact with Rab proteins that are involved in autophagy and endocytic transport. Expansion of a GGGGCC repeat from 2-22 copies to 700-1600 copies in the intronic sequence between alternate 5' exons in transcripts from this gene is associated with 9p-linked ALS (amyotrophic lateral sclerosis) and FTD (frontotemporal dementia) (PMID: 21944778, 21944779). Studies suggest that hexanucleotide expansions could result in the selective stabilization of repeat-containing pre-mRNA, and the accumulation of insoluble dipeptide repeat protein aggregates that could be pathogenic in FTD-ALS patients (PMID: 23393093). Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jul 2016]

C9orf72 Gene-Disease associations (from GenCC):

• frontotemporal dementia and/or amyotrophic lateral sclerosis 1

  Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen
• progressive myoclonus epilepsy

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

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

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018325.5. 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
	C9orf72	NM_018325.5	MANE Select	c.1260-14_1260-13insTTTTTTATTTTTTTTTTTTTAATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT		intron	N/A	NP_060795.1	Q96LT7-1
	C9orf72	NM_001256054.3		c.1260-14_1260-13insTTTTTTATTTTTTTTTTTTTAATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT		intron	N/A	NP_001242983.1	Q96LT7-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	C9orf72	ENST00000380003.8	TSL:1 MANE Select	c.1260-14_1260-13insTTTTTTATTTTTTTTTTTTTAATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT		intron	N/A	ENSP00000369339.3	Q96LT7-1
	C9orf72	ENST00000619707.5	TSL:1	c.1260-14_1260-13insTTTTTTATTTTTTTTTTTTTAATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT		intron	N/A	ENSP00000482753.1	Q96LT7-1
	C9orf72	ENST00000644136.1		c.1293-14_1293-13insTTTTTTATTTTTTTTTTTTTAATTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT		intron	N/A	ENSP00000494872.1	A0A2R8Y5K2

Frequencies

GnomAD3 genomes AF: 0.0000544 AC: 2 AN: 36772 Hom.: 1 Cov.: 0

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000966

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 0

GnomAD4 genome AF: 0.0000544 AC: 2 AN: 36772 Hom.: 1 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 16126

African (AFR) AF: 0.00 AC: 0 AN: 8160

American (AMR) AF: 0.00 AC: 0 AN: 3094

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 1360

East Asian (EAS) AF: 0.00 AC: 0 AN: 1458

South Asian (SAS) AF: 0.00 AC: 0 AN: 716

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 388

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 58

European-Non Finnish (NFE) AF: 0.0000966 AC: 2 AN: 20700

Other (OTH) AF: 0.00 AC: 0 AN: 490

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.24

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs11292923; hg19: chr9-27548433;