Computational modeling of novel inhibitory peptides targeting proteoglycan like region of carbonic anhydrase IX and in vitro validation in HeLa cells

Abstract Carbonic anhydrase IX (CAIX) is a tumour-associated, hypoxia-induced, membrane-bound metallo-enzyme which catalyzes the reversible hydration of carbon dioxide (CO2) to bicarbonate (HCO3−) and proton (H+) ions. Over expression of CAIX is observed in cancers of colon, lung, kidney, breast, etc. CAIX plays a vital role in maintaining favourable intracellular pH for tumour cell growth and extracellular acidification which in-turn leads to drug resistance and spread of factors influencing tumour invasion. The N-terminal proteoglycan (PG) – like fragment of CAIX is unique to this isoform and is considered as potential druggable hotspot. Recently, M75 monoclonal antibody targeting the LPGEEDLPG epitope of PG like region has been proposed to reduce cellular adhesion in cancer cells. LPGEEDLPG fragment in complex with M75 has been crystallized and it serves as a strong base for development of peptide inhibitors based on interacting interfaces. Thus, in this study, an in-depth analysis of intermolecular interactions in LPGEEDLPG-M75 complex was carried out by implementing extensive molecular dynamics simulations, binding free energy calculations so as to infer the major determinant fragments of M75 that can be used as peptide inhibitors targeting PG region. Based on these analyses, 3 peptides (Pep1, Pep2 and Pep3) were synthesized and validated by in vitro assays involving cytotoxicity assessment, CAIX inhibition analysis through Direct and Indirect functional assays, and inhibition of Cell adhesion in HeLa cells. The results reveal Pep1 to be a promising inhibitor as it could efficiently modulate CAIX mediated pH homeostasis and cell adhesion in cancer cells. Communicated by Ramaswamy H. Sarma

[1]  N. Anderson,et al.  Electrometric and colorimetric determination of carbonic anhydrase. , 1948, The Anatomical record.

[2]  J. Hirose,et al.  [Carbonic anhydrase]. , 1983, Tanpakushitsu kakusan koso. Protein, nucleic acid, enzyme.

[3]  R. Kettmann,et al.  Cloning and characterization of MN, a human tumor-associated protein with a domain homologous to carbonic anhydrase and a putative helix-loop-helix DNA binding segment. , 1994, Oncogene.

[4]  R. Kettmann,et al.  Human MN/CA9 gene, a novel member of the carbonic anhydrase family: structure and exon to protein domain relationships. , 1996, Genomics.

[5]  B. Jonsson,et al.  The complete sequence, expression in Escherichia coli, purification and some properties of carbonic anhydrase from Neisseria gonorrhoeae. , 1997, European journal of biochemistry.

[6]  G N Shah,et al.  Human carbonic anhydrase XII: cDNA cloning, expression, and chromosomal localization of a carbonic anhydrase gene that is overexpressed in some renal cell cancers. , 1998, Proceedings of the National Academy of Sciences of the United States of America.

[7]  J. Pastorek,et al.  Human tumour-associated cell adhesion protein MN/CA IX: identification of M75 epitope and of the region mediating cell adhesion , 2000, British Journal of Cancer.

[8]  M. Lerman,et al.  Carbonic anhydrase 9 as an endogenous marker for hypoxic cells in cervical cancer. , 2001, Cancer research.

[9]  W. Sly,et al.  Expression of hypoxia-inducible cell-surface transmembrane carbonic anhydrases in human cancer. , 2001, The American journal of pathology.

[10]  J. Pastorek,et al.  Biodistribution and pharmacokinetics of 125I‐labeled monoclonal antibody M75 specific for carbonic anhydrase IX, an intrinsic marker of hypoxia, in nude mice xenografted with human colorectal carcinoma , 2003, International journal of cancer.

[11]  J. Závada,et al.  Carbonic anhydrase IX (CA IX) mediates tumor cell interactions with microenvironment. , 2005, Oncology reports.

[12]  Richard A. Friesner,et al.  Integrated Modeling Program, Applied Chemical Theory (IMPACT) , 2005, J. Comput. Chem..

[13]  J. Pastorek,et al.  Cancer-associated carbonic anhydrases and their inhibition. , 2008, Current pharmaceutical design.

[14]  A. Scaloni,et al.  Biochemical Characterization of CA IX, One of the Most Active Carbonic Anhydrase Isozymes* , 2008, Journal of Biological Chemistry.

[15]  V. Král,et al.  Stabilization of antibody structure upon association to a human carbonic anhydrase IX epitope studied by X‐ray crystallography, microcalorimetry, and molecular dynamics simulations , 2007, Proteins.

[16]  A. Harris,et al.  Tumor-associated Carbonic Anhydrase 9 Spatially Coordinates Intracellular pH in Three-dimensional Multicellular Growths* , 2008, Journal of Biological Chemistry.

[17]  Claudiu T. Supuran,et al.  Carbonic anhydrases: novel therapeutic applications for inhibitors and activators , 2008, Nature Reviews Drug Discovery.

[18]  B. Wouters,et al.  Deficient carbonic anhydrase 9 expression in UPR-impaired cells is associated with reduced survival in an acidic microenvironment. , 2009, Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology.

[19]  K. Soliman,et al.  Evaluation of endogenous acidic metabolic products associated with carbohydrate metabolism in tumor cells , 2010, Cell Biology and Toxicology.

[20]  J. Pouysségur,et al.  Hypoxia-inducible carbonic anhydrase IX and XII promote tumor cell growth by counteracting acidosis through the regulation of the intracellular pH. , 2009, Cancer research.

[21]  C. Supuran,et al.  Selective Inhibition of Carbonic Anhydrase IX Decreases Cell Proliferation and Induces Ceramide-Mediated Apoptosis in Human Cancer Cells , 2010, Journal of Pharmacology and Experimental Therapeutics.

[22]  A New Peptide Ligand for Targeting Human Carbonic Anhydrase IX, Identified through the Phage Display Technology , 2010, PloS one.

[23]  Nir London,et al.  Can self‐inhibitory peptides be derived from the interfaces of globular protein–protein interactions? , 2010, Proteins.

[24]  W. Sherman,et al.  Probing the α‐Helical Structural Stability of Stapled p53 Peptides: Molecular Dynamics Simulations and Analysis , 2010, Chemical biology & drug design.

[25]  Holger Gohlke,et al.  DrugScorePPI webserver: fast and accurate in silico alanine scanning for scoring protein–protein interactions , 2010, Nucleic Acids Res..

[26]  S. Rho,et al.  Carbonic anhydrase IX (CA9) modulates tumor-associated cell migration and invasion , 2011, Journal of Cell Science.

[27]  Claudiu T. Supuran,et al.  Interfering with pH regulation in tumours as a therapeutic strategy , 2011, Nature Reviews Drug Discovery.

[28]  Vetrivel Umashankar,et al.  In Silico Tools for Molecular Modeling , 2011 .

[29]  P. Lambin,et al.  Specific inhibition of carbonic anhydrase IX activity enhances the in vivo therapeutic effect of tumor irradiation. , 2011, Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology.

[30]  Claudiu T. Supuran,et al.  Recent Developments in Targeting Carbonic Anhydrase IX for Cancer Therapeutics , 2012, Oncotarget.

[31]  Kumardeep Chaudhary,et al.  Cell Penetrating Peptides , 2016 .

[32]  M. Rossi,et al.  Biochemical properties of a novel and highly thermostable bacterial α-carbonic anhydrase from Sulfurihydrogenibium yellowstonense YO3AOP1 , 2012, Journal of enzyme inhibition and medicinal chemistry.

[33]  Caroline Louis-Jeune,et al.  Prediction of protein secondary structure from circular dichroism using theoretically derived spectra , 2012, Proteins.

[34]  Brian D. Weitzner,et al.  Serverification of Molecular Modeling Applications: The Rosetta Online Server That Includes Everyone (ROSIE) , 2013, PloS one.

[35]  G. Lin,et al.  The Potential of Liposomes with Carbonic Anhydrase IX to Deliver Anticancer Ingredients to Cancer Cells in Vivo , 2014, International journal of molecular sciences.

[36]  Kumardeep Chaudhary,et al.  Computer-Aided Virtual Screening and Designing of Cell-Penetrating Peptides. , 2015, Methods in molecular biology.

[37]  Kumardeep Chaudhary,et al.  PEPstrMOD: structure prediction of peptides containing natural, non-natural and modified residues , 2015, Biology Direct.

[38]  Chundi Vinay Kumar,et al.  Mutational analysis of FUS gene and its structural and functional role in amyotrophic lateral sclerosis 6 , 2015, Journal of biomolecular structure & dynamics.

[39]  P. R. Deepa,et al.  Comparative Modeling and Molecular Dynamics Simulation of Substrate Binding in Human Fatty Acid Synthase: Enoyl Reductase and β-Ketoacyl Reductase Catalytic Domains , 2015, Genomics & informatics.

[40]  R. Purohit,et al.  Biophysical aspect of phosphatidylinositol 3-kinase and role of oncogenic mutants (E542K & E545K) , 2016, Journal of biomolecular structure & dynamics.

[41]  C. Supuran Structure and function of carbonic anhydrases. , 2016, The Biochemical journal.

[42]  R. Purohit,et al.  Impact of point mutation P29S in RAC1 on tumorigenesis , 2016, Tumor Biology.

[43]  Sergey Lyskov,et al.  Peptiderive server: derive peptide inhibitors from protein–protein interactions , 2016, Nucleic Acids Res..

[44]  Muthukumaran Sivashanmugam,et al.  Virtual screening, molecular dynamics, and binding free energy calculations on human carbonic anhydrase IX catalytic domain for deciphering potential leads , 2017, Journal of biomolecular structure & dynamics.

[45]  Chandrasekhar Gopalakrishnan,et al.  Pathological role of a point mutation (T315I) in BCR‐ABL1 protein—A computational insight , 2018, Journal of cellular biochemistry.

[46]  B. Mahon,et al.  Carbonic Anhydrases: Role in pH Control and Cancer , 2018, Metabolites.

[47]  Umashankar Vetrivel,et al.  Deciphering ophthalmic adaptive inhibitors targeting RON4 of Toxoplasma gondii: An integrative in silico approach , 2018, Life sciences.

[48]  Anupriya Sadhasivam,et al.  Identification of potential drugs targeting L,L‐diaminopimelate aminotransferase of Chlamydia trachomatis: An integrative pharmacoinformatics approach , 2018, Journal of cellular biochemistry.

[49]  C. Supuran Carbonic Anhydrases and Metabolism , 2018, Metabolites.

[50]  Umashankar Vetrivel,et al.  Design of inhibitory peptide targeting Toxoplasma gondii RON4‐human β‐tubulin interactions by implementing structural bioinformatics methods , 2018, Journal of cellular biochemistry.

[51]  Hemavathy Nagarajan,et al.  Demystifying the pH dependent conformational changes of human heparanase pertaining to structure–function relationships: an in silico approach , 2018, Journal of Computer-Aided Molecular Design.

[52]  R. Purohit,et al.  Gain of native conformation of Aurora A S155R mutant by small molecules , 2019, Journal of cellular biochemistry.

[53]  Activation and inhibition effects of some natural products on human cytosolic CAI and CAII , 2019, Medicinal Chemistry Research.