7LUR

Stable Effector Functionless 2 (SEFL2) IgG1 Fc Scaffold Bound to a Minimized Version of the B-domain (Mini-Z) from Protein A Called Z34C

Summary for 7LUR

• Entry DOI: 10.2210/pdb7lur/pdb
• Descriptor: Immunoglobulin heavy constant gamma 1, Mini Z domain (3 entities in total)
• Functional Keywords: fragment crystallizable, fc, immune system
• Biological source: Homo sapiens (Human); More
• Total number of polymer chains: 4
• Total formula weight: 59393.22

Authors

Sudom, A.,Garces, F.,Wang, Z. (deposition date: 2021-02-23, release date: 2021-09-15, Last modification date: 2024-11-13)

Primary citation

Estes, B.,Sudom, A.,Gong, D.,Whittington, D.A.,Li, V.,Mohr, C.,Li, D.,Riley, T.P.,Shi, S.D.,Zhang, J.,Garces, F.,Wang, Z.
Next generation Fc scaffold for multispecific antibodies.
Iscience, 24:103447-103447, 2021

PubMed Abstract: Bispecific antibodies (Bispecifics) demonstrate exceptional clinical potential to address some of the most complex diseases. However, Bispecific production in a single cell often requires the correct pairing of multiple polypeptide chains for desired assembly. This is a considerable hurdle that hinders the development of many immunoglobulin G (IgG)-like bispecific formats. Our approach focuses on the rational engineering of charged residues to facilitate the chain pairing of distinct heavy chains (HC). Here, we deploy structure-guided protein design to engineer charge pair mutations (CPMs) placed in the CH3-CH3' interface of the fragment crystallizable (Fc) region of an antibody (Ab) to correctly steer heavy chain pairing. When used in combination with our stable effector functionless 2 (SEFL2.2) technology, we observed high pairing efficiency without significant losses in expression yields. Furthermore, we investigate the relationship between CPMs and the sequence diversity in the parental antibodies, proposing a rational strategy to deploy these engineering technologies.

PubMed: 34877503
DOI: 10.1016/j.isci.2021.103447

Experimental method

X-RAY DIFFRACTION (1.95 Å)