FAM111B

This gene encodes a protein with a trypsin-like cysteine/serine peptidase domain in the C-terminus. Mutations in this gene are associated with an autosomal dominant form of hereditary fibrosing poikiloderma (HFP). Affected individuals display mottled pigmentation, telangiectasia, epidermal atrophy, tendon contractures, and progressive pulmonary fibrosis. Alternative splicing results in multiple transcript variants encoding distinct isoforms. A paralog of this gene which also has a trypsin‐like peptidase domain, FAM111A, is located only 16 kb from this gene on human chromosome 11q12.1.

Family With Sequence Similarity 111 Member B

Serine protease.

DNA replication Source: GO_Central

Nucleus; Chromatin

Poikiloderma, hereditary fibrosing, with tendon contractures, myopathy, and pulmonary fibrosis (POIKTMP):
An autosomal dominant form of hereditary poikiloderma, a genodermatosis characterized by mottled pigmentation, telangiectasia, and epidermal atrophy. POIKTMP features include tendon contracture, myopathy, and progressive pulmonary fibrosis. It manifests from early childhood with telangiectasia and pigmentary anomalies especially on the face and sun-exposed areas, tendon contractures that particularly involve the ankles and feet causing gait disturbance, and development of pulmonary fibrosis during the second decade of life resulting in progressive dyspnea and restrictive impairment of lung function.