FBLN5

The protein encoded by this gene is a secreted, extracellular matrix protein containing an Arg-Gly-Asp (RGD) motif and calcium-binding EGF-like domains. It promotes adhesion of endothelial cells through interaction of integrins and the RGD motif. It is prominently expressed in developing arteries but less so in adult vessels. However, its expression is reinduced in balloon-injured vessels and atherosclerotic lesions, notably in intimal vascular smooth muscle cells and endothelial cells. Therefore, the protein encoded by this gene may play a role in vascular development and remodeling. Defects in this gene are a cause of autosomal dominant cutis laxa, autosomal recessive cutis laxa type I (CL type I), and age-related macular degeneration type 3 (ARMD3). [provided by RefSeq, Jul 2008]

Full Name

Fibulin 5

Research Area

Essential for elastic fiber formation, is involved in the assembly of continuous elastin (ELN) polymer and promotes the interaction of microfibrils and ELN (PubMed:18185537).

Stabilizes and organizes elastic fibers in the skin, lung and vasculature (By similarity).

Promotes adhesion of endothelial cells through interaction of integrins and the RGD motif. Vascular ligand for integrin receptors which may play a role in vascular development and remodeling (PubMed:10428823).

May act as an adapter that mediates the interaction between FBN1 and ELN (PubMed:17255108).

Biological Process

Cell-matrix adhesion Source: ProtInc
Elastic fiber assembly Source: UniProtKB
Protein localization to cell surface Source: BHF-UCL
Regulation of cell growth Source: Ensembl
Regulation of removal of superoxide radicals Source: BHF-UCL
Secretion Source: UniProtKB

Cellular Location

Secreted; Extracellular matrix. Co-localizes with ELN in elastic fibers.

Involvement in disease

Neuropathy, hereditary, with or without age-related macular degeneration (HNARMD):
An autosomal dominant neuropathy of the Charcot-Marie-Tooth disease group, characterized by distal muscle weakness and atrophy variably affecting the lower and upper limbs. Distal sensory impairment and decreased nerve conduction velocities are present in most but not all patients. Additional variable features are age-related macular degeneration, joint hypermobility, and hyperelastic skin.
Cutis laxa, autosomal dominant, 2 (ADCL2):
A connective tissue disorder characterized by loose, hyperextensible skin with decreased resilience and elasticity leading to a premature aged appearance. Face, hands, feet, joints, and torso may be differentially affected. Additional variable clinical features are gastrointestinal diverticula, hernia, and genital prolapse. Rare manifestations are pulmonary artery stenosis, aortic aneurysm, bronchiectasis, and emphysema.
Cutis laxa, autosomal recessive, 1A (ARCL1A):
A connective tissue disorder characterized by loose, hyperextensible skin with decreased resilience and elasticity leading to a premature aged appearance. Face, hands, feet, joints, and torso may be differentially affected. The clinical spectrum of autosomal recessive cutis laxa is highly heterogeneous with respect to organ involvement and severity. Type I autosomal recessive cutis laxa is a specific, life-threatening disorder with organ involvement, lung atelectasis and emphysema, diverticula of the gastrointestinal and genitourinary systems, and vascular anomalies. Associated cranial anomalies, late closure of the fontanel, joint laxity, hip dislocation, and inguinal hernia have been observed but are uncommon.
Macular degeneration, age-related, 3 (ARMD3):
A form of age-related macular degeneration, a multifactorial eye disease and the most common cause of irreversible vision loss in the developed world. In most patients, the disease is manifest as ophthalmoscopically visible yellowish accumulations of protein and lipid that lie beneath the retinal pigment epithelium and within an elastin-containing structure known as Bruch membrane.

PTM

N-glycosylated.