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460738-38-9

460738-38-9 structural image
Product Name: ecallantide
Formula: C305H442N88O91S8
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CHEMICAL AND PHYSICAL PROPERTIES

Other Experimental Properties Clear, colorless solution; pH 7.0 /Kalbitor/

COMPUTED DESCRIPTORS

Molecular Weight 7054 g/mol
XLogP3 -27.9
Hydrogen Bond Donor Count 100
Hydrogen Bond Acceptor Count 110
Rotatable Bond Count 133
Exact Mass 7052.0530407 g/mol
Monoisotopic Mass 7049.0429762 g/mol
Topological Polar Surface Area 3120 Ų
Heavy Atom Count 492
Formal Charge 0
Complexity 18500
Isotope Atom Count 0
Defined Atom Stereocenter Count 60
Undefined Atom Stereocenter Count 0
Defined Bond Stereocenter Count 0
Undefined Bond Stereocenter Count 0
Covalently-Bonded Unit Count 1
Compound Is Canonicalized Yes

PRODUCT INTRODUCTION

description

Ecallantide is a potent and selective human plasma kallikrein inhibitor that is indicated for the symptomatic treatment of hereditary angioedema. Ecallantide is a recombinant 60-amino-acid protein produced in Pichia pastoris yeast cells that contains three intramolecular disulfide bonds. It was discovered by phage display technology. It shares sequence similarities with the naturally occurring human protein tissue-factor pathway inhibitor (TFPI), which is also known lipoprotein-associated coagulation inhibitor (LACI). The amino acid sequence of two compounds differ by seven amino acids. Ecallantide works by blocking kallikrein to participate in the kallikrein-kinin system, which is a complex proteolytic cascade that initiates inflammatory and coagulation pathways. The protease plasma kallikerin facilitates the conversion of kininogen to bradykinin, which is a pro-inflammatory vasodilator that increases vascular permeability and induces pain. Hereditary angioedema is a rare autosomal dominant disorder with mutations to C1-esterase-inhibitor (C1-INH) located on Chromosome 11q, resulting in substantially lower levels of C4 and C1-INH activity. The disorder is associated with recurrent attacks of severe swelling and is thought to be caused by unregulated activity of kallikrein and excessive bradykinin production. By reversibly binding to plasma kallikrein, ecallantide displays a rapid on-rate and a slow off-rate that results in high affinity inhibition in the picomolar range. Ecallantide is marketed by FDA and EMA under the trade name Kalbitor for subcutaneous injection. Apart from its FDA and EMA indication, ecallantide has been used off label in the management of nonhistaminergic angioedema, not due to HAE.