chr1-39084257-ATGTCGGAGTGAGCGGTCT-A

Position:

• chr1-39084257-ATGTCGGAGTGAGCGGTCT-A

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM4 BS1_Supporting BS2

The ENST00000567887.5(MACF1):​c.54_71del​(p.Cys20_Ser25del) variant causes a inframe deletion change. The variant allele was found at a frequency of 0.0000713 in 1,612,846 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00018 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000060 (0 hom.)
• Consequence: MACF1 ENST00000567887.5 inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.44

Genes affected

MACF1 (HGNC:13664): (microtubule actin crosslinking factor 1) This gene encodes a large protein containing numerous spectrin and leucine-rich repeat (LRR) domains. The encoded protein is a member of a family of proteins that form bridges between different cytoskeletal elements. This protein facilitates actin-microtubule interactions at the cell periphery and couples the microtubule network to cellular junctions. Alternative splicing results in multiple transcript variants, but the full-length nature of some of these variants has not been determined. [provided by RefSeq, May 2013]

ACMG classification

Verdict is Likely_benign. Variant got -3 ACMG points.

• PM4: Nonframeshift variant in NON repetitive region in ENST00000567887.5.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000184 (28/152222) while in subpopulation AFR AF= 0.000626 (26/41546). AF 95% confidence interval is 0.000438. There are 0 homozygotes in gnomad4. There are 15 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High AC in GnomAd4 at 28 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MACF1	NM_012090.5	c.54_71del	p.Cys20_Ser25del	inframe_deletion	1/93		NP_036222.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MACF1	ENST00000361689.7	c.54_71del	p.Cys20_Ser25del	inframe_deletion	2/94	5		ENSP00000354573
MACF1	ENST00000372915.8	c.54_71del	p.Cys20_Ser25del	inframe_deletion	1/96	5		ENSP00000362006	P1
MACF1	ENST00000484793.5	c.54_71del	p.Cys20_Ser25del	inframe_deletion	3/4	2		ENSP00000434859

Frequencies

GnomAD3 genomes AF: 0.000184 AC: 28 AN: 152104 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000628

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

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: 0.0000147

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000956 AC: 24 AN: 251130 Hom.: 0 AF XY: 0.0000884 AC XY: 12 AN XY: 135770

Gnomad AFR exome AF: 0.000492

Gnomad AMR exome AF: 0.000202

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.0000468

Gnomad NFE exome AF: 0.0000440

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.0000596 AC: 87 AN: 1460624 Hom.: 0 AF XY: 0.0000605 AC XY: 44 AN XY: 726692

Gnomad4 AFR exome AF: 0.000747

Gnomad4 AMR exome AF: 0.000179

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.0000696

Gnomad4 FIN exome AF: 0.0000942

Gnomad4 NFE exome AF: 0.0000369

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome AF: 0.000184 AC: 28 AN: 152222 Hom.: 0 Cov.: 32 AF XY: 0.000202 AC XY: 15 AN XY: 74432

Gnomad4 AFR AF: 0.000626

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000108 Hom.: 0

Bravo AF: 0.000181

EpiCase AF: 0.000109

EpiControl AF: 0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 02, 2024

This variant, c.54_71del, results in the deletion of 6 amino acid(s) of the MACF1 protein (p.Cys20_Ser25del), but otherwise preserves the integrity of the reading frame. This variant is present in population databases (no rsID available, gnomAD 0.07%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with MACF1-related conditions. ClinVar contains an entry for this variant (Variation ID: 2072914). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs376408478; hg19: chr1-39549929;