3FR1
NFLVHS segment from Islet Amyloid Polypeptide (IAPP or Amylin)
Summary for 3FR1
| Entry DOI | 10.2210/pdb3fr1/pdb |
| Related | 3FQP 3FTH 3FTK 3FTL |
| Descriptor | Islet amyloid polypeptide, CHLORIDE ION (3 entities in total) |
| Functional Keywords | amyloid-like protofibril, amidation, amyloid, cleavage on pair of basic residues, hormone, polymorphism, secreted, protein fibril |
| Biological source | Homo sapiens (Human) |
| Cellular location | Secreted : P10997 |
| Total number of polymer chains | 1 |
| Total formula weight | 752.26 |
| Authors | Wiltzius, J.J.W.,Sawaya, M.R.,Eisenberg, D. (deposition date: 2009-01-08, release date: 2009-06-30, Last modification date: 2024-02-21) |
| Primary citation | Wiltzius, J.J.,Landau, M.,Nelson, R.,Sawaya, M.R.,Apostol, M.I.,Goldschmidt, L.,Soriaga, A.B.,Cascio, D.,Rajashankar, K.,Eisenberg, D. Molecular mechanisms for protein-encoded inheritance Nat.Struct.Mol.Biol., 16:973-978, 2009 Cited by PubMed Abstract: In prion inheritance and transmission, strains are phenotypic variants encoded by protein 'conformations'. However, it is unclear how a protein conformation can be stable enough to endure transmission between cells or organisms. Here we describe new polymorphic crystal structures of segments of prion and other amyloid proteins, which offer two structural mechanisms for the encoding of prion strains. In packing polymorphism, prion strains are encoded by alternative packing arrangements (polymorphs) of beta-sheets formed by the same segment of a protein; in segmental polymorphism, prion strains are encoded by distinct beta-sheets built from different segments of a protein. Both forms of polymorphism can produce enduring conformations capable of encoding strains. These molecular mechanisms for transfer of protein-encoded information into prion strains share features with the familiar mechanism for transfer of nucleic acid-encoded information into microbial strains, including sequence specificity and recognition by noncovalent bonds. PubMed: 19684598DOI: 10.1038/nsmb.1643 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.85 Å) |
Structure validation
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