diff --git a/ippisite/ippidb/ws.py b/ippisite/ippidb/ws.py
index 2c178fc1e80ca0bdb39e41d30571bde6756a9797..7a272f2a30e659ae65b408f4825b2085c2c3a9d4 100644
--- a/ippisite/ippidb/ws.py
+++ b/ippisite/ippidb/ws.py
@@ -78,3 +78,8 @@ def get_pfam_info(pfam_acc):
     domain_family = ''
     return {'id': pfam_id,
             'description': description}
+
+def get_pdb_uniprot_mapping(pdb_id):
+    resp = requests.get('https://www.ebi.ac.uk/pdbe/api/mappings/uniprot/{}'.format(pdb_id))
+    uniprot_ids = list(resp.json()[pdb_id]['UniProt'].keys())
+    return uniprot_ids