NM_001378030.1:c.1301+55G>A

Variant names:

• chr16-722867-C-T
• rs190128477
• NM_001378030.1:c.1301+55G>A

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BS1 BS2

The NM_001378030.1(CCDC78):​c.1301+55G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00103 in 1,609,094 control chromosomes in the GnomAD database, including 11 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0052 (5 hom., cov: 34)
  • Exomes 𝑓: 0.00060 (6 hom.)
• Consequence: CCDC78 NM_001378030.1 intron
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.495
• Publications: 0 publications found

Genes affected

CCDC78 (HGNC:14153): (coiled-coil domain containing 78) Involved in de novo centriole assembly involved in multi-ciliated epithelial cell differentiation and skeletal muscle contraction. Located in several cellular components, including centriole; deuterosome; and sarcolemma. Implicated in centronuclear myopathy 4. [provided by Alliance of Genome Resources, Apr 2022]

CCDC78 Gene-Disease associations (from GenCC):

• congenital myopathy with internal nuclei and atypical cores

  Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
• centronuclear myopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen

ACMG classification

Our verdict: Benign. The variant received -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 16-722867-C-T is Benign according to our data. Variant chr16-722867-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 1316291.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00518 (789/152330) while in subpopulation AFR AF = 0.0182 (756/41556). AF 95% confidence interval is 0.0171. There are 5 homozygotes in GnomAd4. There are 344 alleles in the male GnomAd4 subpopulation. Median coverage is 34. This position passed quality control check.
• BS2: High AC in GnomAd4 at 789 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001378030.1. 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
	CCDC78	NM_001378030.1	MANE Select	c.1301+55G>A		intron	N/A	NP_001364959.1	H3BLT8
	CCDC78	NM_001031737.3		c.1297+55G>A		intron	N/A	NP_001026907.2	A2IDD5-1
	CCDC78	NM_001378031.1		c.1121+55G>A		intron	N/A	NP_001364960.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CCDC78	ENST00000345165.10	TSL:5 MANE Select	c.1301+55G>A		intron	N/A	ENSP00000316851.5	H3BLT8
	CCDC78	ENST00000293889.10	TSL:1	c.1297+55G>A		intron	N/A	ENSP00000293889.6	A2IDD5-1
	CCDC78	ENST00000947033.1		c.1302-42G>A		intron	N/A	ENSP00000617092.1

Frequencies

GnomAD3 genomes AF: 0.00518 AC: 789 AN: 152212 Hom.: 5 Cov.: 34

Gnomad AFR AF: 0.0182

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00124

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000882

Gnomad OTH AF: 0.00335

GnomAD2 exomes AF: 0.00132 AC: 329 AN: 248644 AF XY: 0.000911

Gnomad AFR exome AF: 0.0191

Gnomad AMR exome AF: 0.000493

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000493

GnomAD4 exome AF: 0.000599 AC: 872 AN: 1456764 Hom.: 6 Cov.: 33 AF XY: 0.000483 AC XY: 350 AN XY: 724546

African (AFR) AF: 0.0218 AC: 728 AN: 33422

American (AMR) AF: 0.000694 AC: 31 AN: 44664

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26090

East Asian (EAS) AF: 0.00 AC: 0 AN: 39652

South Asian (SAS) AF: 0.0000928 AC: 8 AN: 86200

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51574

Middle Eastern (MID) AF: 0.00104 AC: 6 AN: 5762

European-Non Finnish (NFE) AF: 0.00000631 AC: 7 AN: 1109202

Other (OTH) AF: 0.00153 AC: 92 AN: 60198

GnomAD4 genome AF: 0.00518 AC: 789 AN: 152330 Hom.: 5 Cov.: 34 AF XY: 0.00462 AC XY: 344 AN XY: 74476

African (AFR) AF: 0.0182 AC: 756 AN: 41556

American (AMR) AF: 0.00124 AC: 19 AN: 15314

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5180

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10628

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000882 AC: 6 AN: 68034

Other (OTH) AF: 0.00331 AC: 7 AN: 2114

Alfa AF: 0.00269 Hom.: 0

Bravo AF: 0.00610

Asia WGS AF: 0.000866 AC: 3 AN: 3478

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	2	not provided (2)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	1.4
DANN	Benign	0.51
PhyloP100		-0.49
Mutation Taster		=100/0	polymorphism

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: rs190128477; hg19: chr16-772867;