ATP7A delivers copper to the lysyl oxidase family of enzymes and promotes tumorigenesis and metastasis. 2019

Vinit Shanbhag, and Kimberly Jasmer-McDonald, and Sha Zhu, and Adam L Martin, and Nikita Gudekar, and Aslam Khan, and Erik Ladomersky, and Kamlendra Singh, and Gary A Weisman, and Michael J Petris
Department of Biochemistry, University of Missouri, Columbia, MO 65211.

Lysyl oxidase (LOX) and LOX-like (LOXL) proteins are copper-dependent metalloenzymes with well-documented roles in tumor metastasis and fibrotic diseases. The mechanism by which copper is delivered to these enzymes is poorly understood. In this study, we demonstrate that the copper transporter ATP7A is necessary for the activity of LOX and LOXL enzymes. Silencing of ATP7A inhibited LOX activity in the 4T1 mammary carcinoma cell line, resulting in a loss of LOX-dependent mechanisms of metastasis, including the phosphorylation of focal adhesion kinase and myeloid cell recruitment to the lungs, in an orthotopic mouse model of breast cancer. ATP7A silencing was also found to attenuate LOX activity and metastasis of Lewis lung carcinoma cells in mice. Meta-analysis of breast cancer patients found that high ATP7A expression was significantly correlated with reduced survival. Taken together, these results identify ATP7A as a therapeutic target for blocking LOX- and LOXL-dependent malignancies.

UI MeSH Term Description Entries
D008249 Protein-Lysine 6-Oxidase An enzyme oxidizing peptidyl-lysyl-peptide in the presence of water & molecular oxygen to yield peptidyl-allysyl-peptide plus ammonia & hydrogen peroxide. EC 1.4.3.13. Lysyl Oxidase,Collagen Lysyl Oxidase,6-Oxidase, Protein-Lysine,Lysyl Oxidase, Collagen,Oxidase, Collagen Lysyl,Oxidase, Lysyl,Protein Lysine 6 Oxidase
D008297 Male Males
D008807 Mice, Inbred BALB C An inbred strain of mouse that is widely used in IMMUNOLOGY studies and cancer research. BALB C Mice, Inbred,BALB C Mouse, Inbred,Inbred BALB C Mice,Inbred BALB C Mouse,Mice, BALB C,Mouse, BALB C,Mouse, Inbred BALB C,BALB C Mice,BALB C Mouse
D009362 Neoplasm Metastasis The transfer of a neoplasm from one organ or part of the body to another remote from the primary site. Metastase,Metastasis,Metastases, Neoplasm,Metastasis, Neoplasm,Neoplasm Metastases,Metastases
D009363 Neoplasm Proteins Proteins whose abnormal expression (gain or loss) are associated with the development, growth, or progression of NEOPLASMS. Some neoplasm proteins are tumor antigens (ANTIGENS, NEOPLASM), i.e. they induce an immune reaction to their tumor. Many neoplasm proteins have been characterized and are used as tumor markers (BIOMARKERS, TUMOR) when they are detectable in cells and body fluids as monitors for the presence or growth of tumors. Abnormal expression of ONCOGENE PROTEINS is involved in neoplastic transformation, whereas the loss of expression of TUMOR SUPPRESSOR PROTEINS is involved with the loss of growth control and progression of the neoplasm. Proteins, Neoplasm
D001943 Breast Neoplasms Tumors or cancer of the human BREAST. Breast Cancer,Breast Tumors,Cancer of Breast,Breast Carcinoma,Cancer of the Breast,Human Mammary Carcinoma,Malignant Neoplasm of Breast,Malignant Tumor of Breast,Mammary Cancer,Mammary Carcinoma, Human,Mammary Neoplasm, Human,Mammary Neoplasms, Human,Neoplasms, Breast,Tumors, Breast,Breast Carcinomas,Breast Malignant Neoplasm,Breast Malignant Neoplasms,Breast Malignant Tumor,Breast Malignant Tumors,Breast Neoplasm,Breast Tumor,Cancer, Breast,Cancer, Mammary,Cancers, Mammary,Carcinoma, Breast,Carcinoma, Human Mammary,Carcinomas, Breast,Carcinomas, Human Mammary,Human Mammary Carcinomas,Human Mammary Neoplasm,Human Mammary Neoplasms,Mammary Cancers,Mammary Carcinomas, Human,Neoplasm, Breast,Neoplasm, Human Mammary,Neoplasms, Human Mammary,Tumor, Breast
D003300 Copper A heavy metal trace element with the atomic symbol Cu, atomic number 29, and atomic weight 63.55. Copper-63,Copper 63
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000073840 Copper-Transporting ATPases P-type ATPases which transport copper ions across membranes in prokaryotic and eukaryotic cells. They possess a conserved CYSTEINE-HISTIDINE-SERINE (CPx) amino acid motif within their transmembrane helices that functions in cation translocation and catalytic activation, and an N-terminal copper-binding CxxC motif that regulates enzyme activity. They play essential roles in intracellular copper homeostasis through regulating the uptake, efflux and storage of copper ions, and in cuproprotein biosynthesis. ATP7B Cu-Binding P Type ATPase,ATPase, Cu++ Transporting, beta Polypeptide (Wilson Disease),Copper-Transporting ATPase,Copper-Transporting ATPase 1,Copper-Transporting ATPase 2,Copper-Transporting Adenosine Triphosphatases,Cu(+)-Transporting ATPases,Cu-Transporting ATPases,Menkes Disease-Associated Protein,Pineal Night-Specific ATPase,Wilson Disease Cu-Binding P Type ATPase,ATP7A Protein,ATPase Copper Transporting alpha,Copper Pump 1,PINA Enzyme,Wilson Disease Protein,ATP7B Cu Binding P Type ATPase,ATPase 1, Copper-Transporting,ATPase 2, Copper-Transporting,ATPase, Copper-Transporting,ATPase, Pineal Night-Specific,ATPases, Copper-Transporting,ATPases, Cu-Transporting,Adenosine Triphosphatases, Copper-Transporting,Copper Transporting ATPase,Copper Transporting ATPase 1,Copper Transporting ATPase 2,Copper Transporting ATPases,Copper Transporting Adenosine Triphosphatases,Cu Transporting ATPases,Menkes Disease Associated Protein,Night-Specific ATPase, Pineal,Pineal Night Specific ATPase,Triphosphatases, Copper-Transporting Adenosine,Wilson Disease Cu Binding P Type ATPase

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