A unique algorithm for the determination of peptide-carrier protein conjugation ratio by amino acid analysis using intrinsic internal standard.

Abstract:

:An N-terminal peptide of the HIV-1 fusion peptide (FP) with eight amino acid residues (FP8) was conjugated to a recombinant Tetanus Toxoid Heavy Chain Fragment C (rTTHc) as a carrier protein to help boosting immunogenicity against HIV-1. In this rapid communication, a unique algorithm to determine FP-rTTHc conjugation ratio was developed based off the amino acid analysis. Five well recovered amino acids (present in both FP and rTTHc) were used to calculate the conjugation ratio, while proline (present only in rTTHc) was identified and utilized as the intrinsic internal standard for normalization. With this calculation, the assay variability was minimized (<20%), especially for conjugates with moderate to low conjugation ratios as being compared to previously reported methods. The approach offers a reliable tool to determine the efficiency of the conjugation reactions for in-process monitoring and for final conjugate product characterization.

journal_name

Vaccine

journal_title

Vaccine

authors

Yang GJ,Yang Y,Shaddeau A,Cai CX,Li Y,Gulla K,Zhang Y,Ou L,Cooper JW,Lei QP

doi

10.1016/j.vaccine.2020.04.080

subject

Has Abstract

pub_date

2020-06-15 00:00:00

pages

4507-4511

issue

29

eissn

0264-410X

issn

1873-2518

pii

S0264-410X(20)30642-3

journal_volume

38

pub_type

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