Reduction of Nonspecificity Motifs in Synthetic Antibody Libraries.

Abstract

Successful antibody development requires both functional binding and desirable biophysical characteristics. In the current study, we analyze the causes of one hurdle to clinical development, off-target reactivity, or nonspecificity. We used a high-throughput nonspecificity assay to isolate panels of nonspecific antibodies from two synthetic single-chain variable fragment libraries expressed on the surface of yeast, identifying both individual amino acids and motifs within the complementarity-determining regions which contribute to the phenotype. We find enrichment of glycine, valine, and arginine as both individual amino acids and as a part of motifs, and additionally enrichment of motifs containing tryptophan. Insertion of any of these motifs into the complementarity-determining region H3 of a "clean" antibody increased its nonspecificity, with greatest increases in antibodies containing Trp or Val motifs. We next applied these rules to the creation of a synthetic diversity library based on natural frameworks with significantly decreased incorporation of such motifs and demonstrated its ability to isolate binders to a wide panel of antigens. This work both provides a greater understanding of the drivers of nonspecificity and provides design rules to increase efficiency in the isolation of antibodies with drug-like properties.

Submission Details

ID: vyj9sxAf3

Submitter: Paul Chang

Submission Date: Sept. 19, 2019, 10:56 a.m.

Version: 1

Publication Details
Kelly RL;Le D;Zhao J;Wittrup KD,J Mol Biol (2018) Reduction of Nonspecificity Motifs in Synthetic Antibody Libraries. PMID:29183788
Additional Information

Study Summary

Number of data points 22247
Proteins Immunoglobulin heavy variable 1-69 ; Immunoglobulin lambda variable 1-40 ; Immunoglobulin kappa variable 3-20 ; Immunoglobulin kappa variable 1-39 ; Immunoglobulin heavy variable 5-51 ; Immunoglobulin heavy variable 4-39 ; Immunoglobulin heavy variable 3-23 ; Immunoglobulin heavy variable 3-15
Unique complexes 19579
Assays/Quantities/Protocols Experimental Assay: Sorted Counts ; Experimental Assay: Naive Counts
Libraries Trp free library ; Trp rich library ; Natural library

Structure view and single mutant data analysis

Study data

No weblogo for data of varying length.
Colors: D E R H K S T N Q A V I L M F Y W C G P
 

Data Distribution

Studies with similar sequences (approximate matches)

Correlation with other assays (exact sequence matches)


Relevant UniProtKB Entries

Percent Identity Matching Chains Protein Accession Entry Name
100.0 Immunoglobulin heavy variable 1-69 P01742 HV169_HUMAN
99.1 Immunoglobulin heavy variable 1-69 A0A0B4J2H0 HV69D_HUMAN
100.0 Immunoglobulin lambda variable 1-40 P01703 LV140_HUMAN
100.0 Immunoglobulin kappa variable 3-20 P01619 KV320_HUMAN
96.6 Immunoglobulin kappa variable 3-20 A0A0C4DH25 KVD20_HUMAN
90.5 Immunoglobulin kappa variable 3-20 P04433 KV311_HUMAN
92.8 Immunoglobulin kappa variable 3-20 A0A0A0MRZ8 KVD11_HUMAN
93.2 Immunoglobulin kappa variable 3-20 A0A0C4DH55 KVD07_HUMAN
100.0 Immunoglobulin kappa variable 1-39 P01597 KV139_HUMAN
100.0 Immunoglobulin kappa variable 1-39 P04432 KVD39_HUMAN
91.5 Immunoglobulin kappa variable 1-39 A0A0C4DH73 KV112_HUMAN
91.5 Immunoglobulin kappa variable 1-39 A0A0C4DH69 KV109_HUMAN
90.6 Immunoglobulin kappa variable 1-39 P01611 KVD12_HUMAN
90.6 Immunoglobulin kappa variable 1-39 A0A0C4DH72 KV106_HUMAN
90.6 Immunoglobulin kappa variable 1-39 P01602 KV105_HUMAN
90.6 Immunoglobulin kappa variable 1-39 P0DP09 KV113_HUMAN
90.6 Immunoglobulin kappa variable 1-39 A0A0B4J2D9 KVD13_HUMAN
100.0 Immunoglobulin heavy variable 5-51 A0A0C4DH38 HV551_HUMAN
93.2 Immunoglobulin heavy variable 5-51 A0A0J9YXX1 HV5X1_HUMAN
100.0 Immunoglobulin heavy variable 4-39 P01824 HV439_HUMAN
94.9 Immunoglobulin heavy variable 4-39 P0DP06 HVD34_HUMAN
94.9 Immunoglobulin heavy variable 4-39 A0A0C4DH41 HV461_HUMAN
95.8 Immunoglobulin heavy variable 4-39 P0DP08 HVD82_HUMAN
93.2 Immunoglobulin heavy variable 4-39 P0DP07 HV431_HUMAN
94.9 Immunoglobulin heavy variable 4-39 P01825 HV459_HUMAN
91.5 Immunoglobulin heavy variable 4-39 A0A087WSY4 HV432_HUMAN
91.5 Immunoglobulin heavy variable 4-39 A0A0C4DH34 HV428_HUMAN
100.0 Immunoglobulin heavy variable 3-23 P01764 HV323_HUMAN
90.6 Immunoglobulin heavy variable 3-23 P0DP04 HV43D_HUMAN
91.5 Immunoglobulin heavy variable 3-23 A0A075B6Q5 HV364_HUMAN
90.6 Immunoglobulin heavy variable 3-23 A0A0J9YX35 HV64D_HUMAN
91.5 Immunoglobulin heavy variable 3-23 A0A0C4DH42 HV366_HUMAN
90.6 Immunoglobulin heavy variable 3-23 P19181 HV05_CARAU
100.0 Immunoglobulin heavy variable 3-15 A0A0B4J1V0 HV315_HUMAN