Characterization of protein higher order structure using vibrational circular dichroism spectroscopy.

Abstract:

:Better understanding of protein higher order structures (HOS) is of major interest to researchers in the field of biotechnology and biopharmaceutics. Monitoring a protein's HOS is crucial towards understanding the impact of molecular conformation on the biotechnological application. In addition, maintaining the HOS is critical for achieving robust processes and developing stable formulations of therapeutic proteins. Loss of HOS contributes to increased aggregation, enhanced immunogenicity and loss of function. Selecting the proper biophysical methods to monitor the secondary and tertiary structures of therapeutic proteins remains the central question in this field. In this study, both Fourier Transform Infrared (FTIR) and vibrational circular dichroism (VCD) spectroscopy are employed to characterize the secondary structures of various proteins as a function of temperature and pH. Three proteins with different secondary structures were examined, human serum albumin (HSA), myoglobin, and the monoclonal antibody, ofatumumab. This work demonstrates that VCD is useful technique for monitoring subtle secondary structure changes of protein therapeutics that may occur during processing or handling.

journal_name

Curr Pharm Biotechnol

authors

Nagarkar RP,Murphy BM,Yu X,Manning MC,Al-Azzam WA

doi

10.2174/1389201011314020010

subject

Has Abstract

pub_date

2013-01-01 00:00:00

pages

199-208

issue

2

eissn

1389-2010

issn

1873-4316

pii

CPB-EPUB-20121116-1

journal_volume

14

pub_type

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