2AAA
CALCIUM BINDING IN ALPHA-AMYLASES: AN X-RAY DIFFRACTION STUDY AT 2.1 ANGSTROMS RESOLUTION OF TWO ENZYMES FROM ASPERGILLUS
Entity
| Entity ID | Chain ID | Description | Type | Chain length | Formula weight | Number of molecules | DB Name (Accession) | Biological source | Descriptive keywords |
| 1 | A (A) | alpha-amylase | polymer | 476 | 52228.2 | 1 | UniProt (F1C3F8) UniProt (by SIFTS) (P56271) | Aspergillus niger | 1,4-alpha-D-glucan glucanohydrolase |
| 2 | B (B) | alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | branched | 748.7 | 1 | In PDB GlyTouCan (G81315DD) | |||
| 3 | C, D, E (C, E, F) | 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose | branched | 424.4 | 3 | In PDB GlyTouCan (G42666HT) | |||
| 4 | F (A) | CALCIUM ION | non-polymer | 40.1 | 1 | Chemie (CA) PubChem (271) | |||
| 5 | G, H, I (A) | DI(HYDROXYETHYL)ETHER | non-polymer | 106.1 | 3 | Chemie (PEG) PubChem (8117) | |||
| 6 | J (A) | SODIUM ION | non-polymer | 23.0 | 1 | Chemie (NA) PubChem (923) | |||
| 7 | K (A) | water | water | 18.0 | 284 | Chemie (HOH) |
Sequence viewer
Contents of the asymmetric unit
| Polymers | Number of chains | 1 |
| Total formula weight | 52228.2 | |
| Branched | Number of molecules | 4 |
| Total formula weight | 2021.9 | |
| Non-Polymers* | Number of molecules | 5 |
| Total formula weight | 381.4 | |
| All* | Total formula weight | 54631.5 |
