Genomic coordinate (human 12:110,280,616 ATP2A2).
Cytoband (human 12q24.11 ATP2A2).
Intraband %= 62.2%
Here I present: “Darier Disease”, Victor McKusick, Mendelian Inheritance in Man’, 1966. (ATP2A2)
Darier disease (keratosis follicularis) is a genetic skin disorder characterized by persistent, greasy, scaly bumps (papules) that primarily affect seborrheic areas of the body. It is a chronic, lifelong condition that typically manifests during adolescence. It is caused by mutations in the ATP2A2 gene, which disrupts calcium transport within skin cells, weakening the “cement” that holds them together.
Here theATP2A2 gene is modeled as a mathematical cusp catastrophe landscape. It illustrates how varying tissue and chemical environments shift a single genetic factor into multiple distinct diseases.
Core Components.
Central Driver: The ATP2A2 gene (located on cytoband 12q24.11).
Encoded Protein: The SERCA2 Ca²⁺ pump, regulating cellular calcium levels.
Mathematical Surface: The folding manifold is defined by the cusp catastrophe equation.
Axis Definitions.
Vertical Axis: Cell State, representing phenotypic expression.
Left Horizontal Axis: Tissue Structural Parameter, representing physical or mechanical tissue traits.
Right Horizontal Axis: Paracrine Signal Gradient, representing cell-signaling concentration levels.
Modeled Phenotypic Fates.
Sebum Secretion Cell: The normal, baseline cell state occupying the smooth, lower region of the manifold.
Acrokeratosis Verruciformis: A localized skin condition with wart-like lesions, emerging on the left upper branch.
Darier Disease: A severe skin disorder marked by abnormal keratinization, sitting on the right upper fold.
Rhabdomyolysis Susceptibility-2: Acute skeletal muscle breakdown occurring during critical functional transitions or drops across the surface.
