Function

Lysin (Lys) is a protein which cleaves cell walls. Egg Lysin, a protein from abalone sperm, creates a hole in the envelope of the egg, permitting the sperm to pass through the envelope and fuse with the egg.

Structural highlights

The structure of lysin, refined at 1.9 angstroms resolution, reveals an alpha-helical, amphipathic molecule. . you can see the alpha helixes in pink. exhibits three features: two tracks of basic residues that span the length of the molecule, a solvent-exposed cluster of ,(in green) and an extended amino-terminal hypervariable domain that is species-specific. The structure suggests possible mechanisms of action[1].

3D structure of lysin

Updated on 29-May-2025

1lis, 1lyn, 2lis, 2lyn, 3lyn – Lys - abalone

1nkl – NK-Lys – pig – NMR
4cvd – Lys – bacteriophage CP-7
1h09 – bLys – bacteriophage CP-1
1oba – bLys + choline
2ixu – bLys + peptidoglycan analog
2ixv, 2j8f, 2j8g – bLys (mutant) + peptidoglycan analog
2mk5 – GH15Lys residues 368-495 – phage GH15 – NMR
4olk – GH15Lys CHAP domain residues 1-165
4ols – GH15Lys amidase domain residues 165-403

Abalone lysin (PDB code 1lis)

Drag the structure with the mouse to rotate

ReferencesReferences

  1. Shaw A, McRee DE, Vacquier VD, Stout CD. The crystal structure of lysin, a fertilization protein. Science. 1993 Dec 17;262(5141):1864-7. PMID:8266073

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Carmit Ginesin, Michal Harel, Jaime Prilusky, Alexander Berchansky, Joel L. Sussman