A: Trans-sialidase B: Trans-sialidase C: Trans-sialidase H: heavy chain of the Fab fragment of immunoglobulin G I: heavy chain of the Fab fragment of immunoglobulin G J: heavy chain of the Fab fragment of immunoglobulin G L: light chain of the Fab fragment of immunoglobulin G M: light chain of the Fab fragment of immunoglobulin G N: light chain of the Fab fragment of immunoglobulin G hetero molecules
The biological assembly is a heterotrimer, with three trimers in the ASU (chains A-H-L, B-I-M and C-J-N). Each heterotrimers corresponds to a stable binary complex between trans-sialidase (e.g. chain A) and a Fab IgG fragment, itself a heterodimer (chains H and L).
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Components
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Protein , 1 types, 3 molecules ABC
#1: Protein
Trans-sialidase
Mass: 71389.258 Da / Num. of mol.: 3 Mutation: N59F,S263T,R477H,V485L,S496K,V497G,E521K,E559V,D594G,I598D,H600R Source method: isolated from a genetically manipulated source Source: (gene. exp.) Trypanosoma cruzi (eukaryote) / Plasmid: pTrcHisA / Production host: Escherichia coli (E. coli) / Strain (production host): Top10f / References: UniProt: Q26966, exo-alpha-sialidase
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Antibody , 2 types, 6 molecules HIJLMN
#2: Antibody
heavychainoftheFabfragmentofimmunoglobulinG
Mass: 23869.732 Da / Num. of mol.: 3 / Source method: isolated from a natural source Details: monoclonal antibody was obtained from hybridomas (after fusion of mice splenocytes with Sp2/0 cells), and the Fab fragment obtained by standard papain digestion Source: (natural) Mus musculus (house mouse) / Strain: C3H/HeJ
#3: Antibody
lightchainoftheFabfragmentofimmunoglobulinG
Mass: 23382.764 Da / Num. of mol.: 3 / Source method: isolated from a natural source Details: monoclonal antibody was obtained from hybridomas (after fusion of mice splenocytes with Sp2/0 cells), and the Fab fragment obtained by standard papain digestion Source: (natural) Mus musculus (house mouse) / Strain: C3H/HeJ
Mass: 18.015 Da / Num. of mol.: 42 / Source method: isolated from a natural source / Formula: H2O
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Details
Has protein modification
Y
Sequence details
AUTHORS STATE THAT UNIPROT ENTRY Q26966 HAS FOUR SEQUENCE ERRORS. THESE DISCREPANCIES HAVE BEEN ...AUTHORS STATE THAT UNIPROT ENTRY Q26966 HAS FOUR SEQUENCE ERRORS. THESE DISCREPANCIES HAVE BEEN REPEATEDLY INDICATED IN ALL PROVIOUS XRAY STRUCTURES RELATED TO TRYPANOSOMA CRUZI TRANS-SIALIDASE. THESE ERRORS CONCERN RESIDUES 262 (INDEED A THR), 476 (A HIS), 484 (A LEU) AND 558 (A VAL). HENCE, THESE DISCREPANCIES IN CHAINS A, B AND C, ARE NOT THE RESULT OF PROTEIN ENGINEERING.
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Experimental details
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Experiment
Experiment
Method: X-RAY DIFFRACTION / Number of used crystals: 1
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Sample preparation
Crystal
Density Matthews: 3.62 Å3/Da / Density % sol: 66.04 %
Crystal grow
Temperature: 293 K / Method: vapor diffusion, hanging drop / pH: 8.5 Details: 0.1 M Bicina, 10 % PEG 20000, 4% 1,4-dioxano, pH 8.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K
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