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Function

Essential for normal cell-cell adhesion in the cornified cell layers (PubMed:29758285). Important for proper integrity and mechanical strength of the stratum corneum of the epidermis (PubMed:29505760).

Involvement in disease

Peeling skin syndrome 6

PSS6

A form of peeling skin syndrome, a genodermatosis characterized by generalized, continuous shedding of the outer layers of the epidermis. Two main PSS subtypes have been suggested. Patients with non-inflammatory PSS (type A) manifest white scaling, with painless and easy removal of the skin, irritation when in contact with water, dust and sand, and no history of erythema, pruritis or atopy. Inflammatory PSS (type B) is associated with generalized erythema, pruritus and atopy. It is an ichthyosiform erythroderma characterized by lifelong patchy peeling of the entire skin with onset at birth or shortly after. Several patients have been reported with high IgE levels. PSS6 patients manifest generalized ichthyotic dry skin, and bullous peeling lesions on the trunk and limbs at sites of minor trauma. Skin symptoms are exacerbated by warmth and humidity. PSS6 inheritance is autosomal recessive.

None

The disease is caused by variants affecting the gene represented in this entry.

Post-translational modifications

Deiminated by PADI1, PADI2 or PADI3 in vitro. The deiminated form is degraded by calpain-1/CAPN1 more quickly and into shorter peptides than the intact protein.

May be processed by calpain-1/CAPN1 in the uppermost epidermal layers.

Sequence similarities

Belongs to the S100-fused protein family.

In the N-terminal section; belongs to the S-100 family.

Tissue specificity

Expressed in skin, thymus, stomach and placenta, but not detected in heart, brain, liver, lung, bone marrow, small intestine, spleen, prostate, colon, adrenal gland, kidney, pancreas, mammary gland, bladder, thyroid, salivary gland and trachea. Weakly expressed in esophagus, tonsils and testis (at protein level). In the skin, strongly expressed in the upper stratum granulosum and lower stratum corneum, but not detected in the upper stratum corneum (at protein level) (PubMed:19384417, PubMed:21531719). In scalp hair follicles, mainly restricted within the granular and cornified cells surrounding the infundibular outer root sheath, with weak expression in central and proximal outer root sheath (at protein level). Tends to be down-regulated in sporiatic lesions compared to non-lesional skin inthe same patients (PubMed:19384417).

Cellular localization

  • Cytoplasm
  • Cytoplasmic granule
  • In the stratum corneum of the epidermis, dispersed diffusely throughout the cytoplasm, while in the stratum granulosum, localized within keratohyalin granules (PubMed:19384417, PubMed:21531719). In granular keratinocytes and in lower corneocytes, colocalizes with calpain-1/CAPN1.

Alternative names

IFPS, FLG2, Filaggrin-2, FLG-2, Intermediate filament-associated and psoriasis-susceptibility protein, Ifapsoriasin

Target type

Proteins

Primary research area

Oncology

Molecular weight

248073Da

We found 1 product in 1 category

Primary Antibodies

Target

Application

Reactive species

Search our catalogue for 'FLG2' (1)

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