Searches or browses for structures by Enzyme Commission (EC) Number. The Enzyme Classification Browser is a hierarchical
representation of enzymes by the enzyme classification according to the nomenclature of the International Union of Biochemistry
and Molecular Biology (IUBMB).
Structures of a particular enzyme can be searched in the browser tree by using a term or a partial or full EC number.
The enzyme browser permits the user to navigate through the hierarchy of enzyme classification to arrive at the subset of
particular interest. The browser opens up the top level in the hierarchy. Clicking on the arrow/folder icons expands the respective
nodes. Clicking on the name of the node will retrieve all PDB IDs assigned that EC number.
Note: Since the publication of the Enzyme Handbook IUBMB has obsoleted several EC entries either by deleting them completely or
allocating them to (some times more than one) new EC entries.
Some of these EC numbers are still referred by PDB entries, and they are labeled accordingly as "Deleted entries" or "Transferred entries".
Important: Make sure pop-ups are enabled in your browser (Click here to check).
Type Histidine kinase in the text box above the tree and click the button "Find in Tree". The tree expands and nodes matching the
keyword expand. To see the number of matching PDB structures mouse over an entry. To view the list of structures, click on a node.
Type the partial EC number 3.2.1 in the search box and click the button "Find in Tree". The tree expands and all nodes 3.2.1. are
highlighted in gray.
Mouse over Transferases to see the number of structures with the term transferase. Expand the node 2.7: Transferring phosphorous-containing groups
by clicking on the triangle. Mouse over 2.7.11: Protein-serine/threonine kinases to see the number of structures related to this node. Click on the
2.7.11: Protein-serine/threonine kinases to display the list of protein-serine/threonine kinases.
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RCSB PDB is a member of the
The RCSB PDB is funded by a grant (DBI-1338415) from the
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National Institutes of Health, and the
US Department of Energy.