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mmCIF File Format
- mmCIF File Format
- The mmCIF file format (macromolecular Crystallographic
- Information) was developed under the auspices of the International Union of Crystallography (IUCr) to extend the Crystallographic Information
- File (CIF) data representation used for describing small molecule
- structures and associated diffraction experiments.
- Merits of mmCIF file format
-
- - Large structures (containing >62 chains and/or 99999 ATOM
- records) that cannot be fully represented in the PDB file format are
- available in the PDB archive as single PDBx/mmCIF files.
- - PDBx/mmCIF file format provides richer data annotation
- - PDBx/mmCIF became the standard PDB archive format in 2014.
- Since 2016 the PDB File Format is no longer being modified or
- extended to support new content.
-
-
+ What is mmCIF ?
+
mmCIF stands for 'macro-molecular Crystallographic Information
+ File'. This format was developed by the PDB consortium and the
+ International Union of Crystallography (IUCr), based on
+ Crystallographic Information File (CIF), a format used for describing
+ the structures of small molecules.
mmCIF became the recommended format
+ for the exchange of biomacromolecular structures in 2014.
+
+ mmCIF and Jalview
Since Jalview 2.10, mmCIF
+ is used for structures downloaded from the PDB. This means:
+
+
+ - Jalview can use the mmCIF to read structures that are too
+ large to be represented by a single PDB file. (ie, with more than
+ >62 chains and/or 99999 ATOM records).
+ - Jalview users will have access to the richer annotation
+ provided by PDBx/mmCIF files.
+ - There may be slight differences between sequences
+ containing modified residues for structures downloaded in mmCIF
+ format. This is because mmCIF differs from the PDB format in the
+ way it describes non-standard sequence data.
+
- mmCIF file format support for importing 3D structure data from
- flat file and EMBL-PDBe via mmCIF was added in Jalview 2.9.1
+ Support for importing 3D structure data from flat file and
+ EMBL-PDBe as mmCIF was added in Jalview 2.10