Abstract
Lysyl oxidase like 3 (LOXL3) is a copper-dependent amine oxidase responsible for the crosslinking of collagen and elastin in the extracellular matrix. LOXL3 belongs to a family including other members: LOX, LOXL1, LOXL2, and LOXL4. Autosomal recessive mutations are rare and described in patients with Stickler syndrome, early-onset myopia and non-syndromic cleft palate. Along with an essential function in embryonic development, multiple biological functions have been attributed to LOXL3 in various pathologies related to amino oxidase activity. Additionally, various novel roles have been described for LOXL3, such as the oxidation of fibronectin in myotendinous junction formation, and of deacetylation and deacetylimination activities of STAT3 to control of inflammatory response. In tumors, three distinct roles were described: (1) LOXL3 interacts with SNAIL and contributes to proliferation and metastasis by inducing epithelial-mesenchymal transition in pancreatic ductal adenocarcinoma cells; (2) LOXL3 is localized predominantly in the nucleus associated with invasion and poor gastric cancer prognosis; (3) LOXL3 interacts with proteins involved in DNA stability and mitosis completion, contributing to melanoma progression and sustained proliferation. Here we review the structure, function and activity of LOXL3 in normal and pathological conditions and discuss the potential of LOXL3 as a therapeutic target in various diseases.
Highlights
The lysyl oxidase (LOX) family is composed of five members: LOX, LOXL1, LOXL2, Lysyl oxidase like 3 (LOXL3), and LOXL4
SNAIL and contributes to proliferation and metastasis by inducing epithelial-mesenchymal transition in pancreatic ductal adenocarcinoma cells; (2) LOXL3 is localized predominantly in the nucleus associated with invasion and poor gastric cancer prognosis; (3) LOXL3 interacts with proteins involved in DNA stability and mitosis completion, contributing to melanoma progression and sustained proliferation
The amino acid sequence similarity is higher between LOXL3 and LOXL2 with 69% homology, whereas between LOXL3 and the other members, LOX, LOXL1, and LOXL4 homology is around 50% [4,5]
Summary
The lysyl oxidase (LOX) family is composed of five members: LOX, LOXL1, LOXL2, LOXL3, and LOXL4. All members are copper-dependent amine oxidases responsible for the covalent crosslinking of soluble collagen and elastin chains into insoluble forms. They contribute to extracellular matrix (ECM) stiffness and stabilization. LOXL3 is the member of the LOX family on which fewer studies have been conducted. LOXL3 activity as an amino oxidase was based on the homology with the other members of the family. We review the structure, function, and activity of LOXL3 development and various pathologies. We review the structure, function, and activity of LOXL3.
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