9-135817987-G-A

Variant names:

• chr9-135817987-G-A
• rs755613665
• NM_015447.4:c.4261C>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_015447.4(CAMSAP1):​c.4261C>T​(p.Pro1421Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000131 in 152,224 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign 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. P1421H) has been classified as Uncertain significance.

• Frequency: Genomes: 𝑓 0.000013 (0 hom., cov: 32)
• Consequence: CAMSAP1 NM_015447.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.77
• Publications: 0 publications found

Genes affected

CAMSAP1 (HGNC:19946): (calmodulin regulated spectrin associated protein 1) Enables microtubule minus-end binding activity and spectrin binding activity. Involved in several processes, including neuron projection development; regulation of cell morphogenesis; and regulation of microtubule polymerization. Located in microtubule. Colocalizes with microtubule minus-end. [provided by Alliance of Genome Resources, Apr 2022]

CAMSAP1 Gene-Disease associations (from GenCC):

• cortical dysplasia, complex, with other brain malformations 12

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3678872).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015447.4. 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
	CAMSAP1	NM_015447.4	MANE Select	c.4261C>T	p.Pro1421Ser	missense	Exon 14 of 17	NP_056262.3	Q5T5Y3-1
	CAMSAP1	NM_001437279.1		c.4294C>T	p.Pro1432Ser	missense	Exon 15 of 18	NP_001424208.1
	CAMSAP1	NM_001437280.1		c.3829C>T	p.Pro1277Ser	missense	Exon 13 of 16	NP_001424209.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CAMSAP1	ENST00000389532.9	TSL:5 MANE Select	c.4261C>T	p.Pro1421Ser	missense	Exon 14 of 17	ENSP00000374183.4	Q5T5Y3-1
	CAMSAP1	ENST00000312405.10	TSL:1	c.3427C>T	p.Pro1143Ser	missense	Exon 12 of 15	ENSP00000312463.6	Q5T5Y3-2
	CAMSAP1	ENST00000409386.3	TSL:5	c.4294C>T	p.Pro1432Ser	missense	Exon 15 of 18	ENSP00000386420.3	Q5T5Y3-3

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152224 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000483

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: 0.00

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 31

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152224 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 74368

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.0000483 AC: 2 AN: 41448

American (AMR) AF: 0.00 AC: 0 AN: 15290

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5196

South Asian (SAS) AF: 0.00 AC: 0 AN: 4826

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68048

Other (OTH) AF: 0.00 AC: 0 AN: 2092

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.00000000770867), which strongly suggests a high chance of mosaicism in these individuals.

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.091	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	18
DANN	Benign	0.94
DEOGEN2	Benign	0.052	T
Eigen	Uncertain	0.26
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D
M_CAP	Benign	0.034	D
MetaRNN	Benign	0.37	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.2	L
PhyloP100		6.8
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-1.5	N
REVEL	Uncertain	0.30
Sift	Benign	0.067	T
Sift4G	Benign	0.33	T
Polyphen		1.0	D
Vest4		0.49
MutPred		0.15		Gain of phosphorylation at P1421 (P = 0.0163)
MVP		0.17
MPC		0.86
ClinPred		0.73	D
GERP RS		5.4
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.065
gMVP		0.38
Mutation Taster		=79/21	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: rs755613665; hg19: chr9-138709833;