Integrative Structural-Functional Genomics of Fc and Fab: Precision Models for Monoclonal Antibody Stability and Anti-Aggregation Engineering

Year : 2026 | Volume : 04 | Issue : 01 | Page :
By

Tapaswi Ram Khajuria,

Prof (Dr.) Atul Khajuria,

KIRAN KUMARI,

  1. Retd. Lecturer, Education Dept. Govt. Higher Sec School Barola Udhampur, J & K, India
  2. Professor, University School of Allied and Health Care Sciences Rayat Bahra Professional University VPO BOHAN, Tehsil Distt. Hoshiarpur, Punjab, India
  3. Retd. Govt. Master, Education Dept. Govt. High School Pachote, Chenani, Udhampur, J&K, India

Abstract

Monoclonal antibodies (mAbs) represent the cornerstone of biotherapeutics, yet aggregation propensity compromises up to 50% of candidates during development, driven by Fab hypervariability and Fc vulnerabilities.(1,2) This review integrates functional genomics from OAS (4B+ sequences)(5) and structural databases (SAbDab: 10K+ structures)(6) with machine learning models achieving R=0.97 for SAP prediction.(11) We dissect biophysical mechanisms, benchmark predictive tools (DeepSP, ESM2), and engineering strategies (YTE, FW mutations) that enhance Tm by 5-10°C while preserving affinity.(14,25) Case studies from trastuzumab variants and COVID mAbs demonstrate 30-55% aggregation reduction.(7,11) Integrative pipelines fuse repertoire mining, AlphaFold3 structures, and MD- featurized ML to de-risk developability, slashing attrition by 35%.(7) Future directions emphasize multi- task models for high-conc. subcutaneous delivery (200 mg/mL).(22)

Keywords: monoclonal antibodies; mAb developability; Fc engineering; Fab stability; antibody aggregation; structural genomics; repertoire sequencing; machine learning prediction; thermostability (Tm); aggregation propensity (SAP); self-interaction (SCM); AlphaFold3; DeepSP; OAS database; SAbDab; V(D)J recombination; somatic hypermutation; CDR-H3 loops; high-concentration formulations; subcutaneous delivery

[This article belongs to International Journal of Molecular Biotechnological Research ]

How to cite this article: Tapaswi Ram Khajuria, Prof (Dr.) Atul Khajuria, KIRAN KUMARI. Integrative Structural-Functional Genomics of Fc and Fab: Precision Models for Monoclonal Antibody Stability and Anti-Aggregation Engineering. International Journal of Molecular Biotechnological Research. 2026; 04(01):-.
How to cite this URL: Tapaswi Ram Khajuria, Prof (Dr.) Atul Khajuria, KIRAN KUMARI. Integrative Structural-Functional Genomics of Fc and Fab: Precision Models for Monoclonal Antibody Stability and Anti-Aggregation Engineering. International Journal of Molecular Biotechnological Research. 2026; 04(01):-. Available from: https://journals.stmjournals.com/ijmbr/article=2026/view=240929

References

1. Precedence Research. Monoclonal Antibodies Market Size to Hit USD 880.01 Bn By 2035. 2026.

2. Rapid Novor. Antibody Developability – Sequence & Structure Impacts Aggregation. 2023.

3. Biointron. V(D)J Recombination: Molecular Basis of Antibody Diversity. 2025.

4. Wang J. Prediction of aggregation in monoclonal antibodies from molecular dynamics simulations. Front Mol Biosci. 2025;12:1231799.

5. Observed Antibody Space. A diverse database of cleaned antibody sequences. PMC. 2021.

6. Dunbar J. SAbDab: the structural antibody database. Nucleic Acids Res. 2014;42:D1140-6.

7. Akbar R, Bashour H, Rawat P, et al. Progress and challenges for the machine learning-based design of fit-for-purpose monoclonal antibodies. MAbs. 2022;14(1):2008790.

8. Liu Y. Structural Basis of Antibody Conformation and Stability. Antibodies (Basel). 2022;11(1):2.

9. Wiley. V(D)J recombination, somatic hypermutation and class switch recombination of immunoglobulins. Immunol. 2019.

10. Oxford. SAbDab updates including SAbDab-nano. Nucleic Acids Res. 2022;50:D1368.

11. Zhang Y, Li W. DeepSP: Deep Learning-Based Spatial Properties to Predict Antibody Aggregation. bioRxiv. 2024. doi:10.1101/2024.02.28.582582.

12. Roberts CJ. Physicochemical Stability of Monoclonal Antibodies: A Review. J Pharm Sci. 2020;109(1):4-18.

13. Harmalkar A, Rao R, Xie YR, et al. Toward generalizable prediction of antibody thermostability using machine learning. MAbs. 2023;15(1):2163584.

14. Jain T. Fc-Engineered Therapeutic Antibodies: Recent Advances. Antibodies (Basel). 2023;12(4):64.

15. Perchiacca JM, Tessier PM. Strategies to stabilize compact folding of antibody fragments. Protein Sci. 2014;23(12):1829-38.

16. Rantalainen M. Immunoglobulin constant regions provide stabilization to the antibody Fab fold. bioRxiv. 2024.

17. Cordoba AJ. Conformational stability and aggregation of therapeutic monoclonal antibodies. MAbs. 2011;3(4):370-80.

18. Rathore AS. Aggregation Stability of a Monoclonal Antibody During Downstream Processing. Academia. 2011.

19. Jaramillo DP, Wagner K. Fate of a Stressed Therapeutic Antibody. J Phys Chem B. 2017;121(38):8955-8965.

20. Wang J. Prediction of aggregation in monoclonal antibodies from MD simulations. Front Mol Biosci. 2025.

21. Akbar R. Competing aggregation pathways for monoclonal antibodies. FEBS Lett. 2014;588(17):2908-14.

22. Jaramillo DP. High-Pressure Induced Unfolding and Aggregation of Antibodies. J Phys Chem B. 2022;126(15):2789-2800.

23. Biointron Team. Understanding Monoclonal Antibody Stability. Biointron Blog. 2025.

24. Tomar N. Stability enhancement in a mAb and Fab coformulation. Sci Rep. 2020;10(1):21247.

25. Chen X. Sequence-Only Prediction of Antibody Fab Thermostability. bioRxiv. 2026.

26. Raybould MIJ. Long-term stability predictions of therapeutic monoclonal antibodies. Sci Rep. 2021;11(1):20428.

27. Wu H. Prediction and Reduction of the Aggregation of Monoclonal Antibodies. J Mol Biol. 2017;429(12):1907-1924.

28. Perevozchikova T. Computational Screening for mAb Colloidal Stability. J Phys Chem B. 2024;128(5):1123-1131.

29. Roberts CJ. Understanding molecular mechanisms governing antibody aggregation. Biotechnol Adv. 2023;67:108215.

30. Nature. A Unified Dataset for Antibody and Nanobody Design. Sci Data. 2026.

31. Hamel CF, Dimaio F. Antibody interfaces revealed through structural mining. Comput Struct Biotechnol J. 2023;21:123-135.

32. Aggregation Time Machine: Prediction Platform. J Med Chem. 2022.

33. CNCB. OAS – Observed Antibody Space Database. 2026.

34. Ideker T. Integrative functional genomics. Nat Biotechnol. 2004;22(7):853-9.

35. Harmalkar A. Machine Learning Models for Predicting Monoclonal Antibody Properties. Mol Pharm. 2024;21(12):5678-5690.


Regular Issue Subscription Review Article
Volume 04
Issue 01
Received 22/04/2026
Accepted 24/04/2026
Published 05/05/2026
Publication Time 13 Days


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