2WX9

Crystal structure of the sialic acid binding periplasmic protein SiaP

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A	SIALIC ACID-BINDING PERIPLASMIC PROTEIN SIAP	polymer	312	35075.6	1	UniProt (P44542) Pfam (PF03480) In PDB	HAEMOPHILUS INFLUENZAE	N-ACETYLNEURAMINIC-BINDING PROTEIN, NEU5AC-BINDING PROTEIN, EXTRACYTOPLASMIC SOLUTE RECEPTOR PROTEIN SIAP
2	A	N-glycolyl-beta-neuraminic acid	non-polymer		325.3	1	Chemie (NGE)
3		water	water		18.0	548	Chemie (HOH)

Sequence modifications

A: 1 - 306 (UniProt: P44542)

PDB	External Database	Details
Asn 11	Ala 34	engineered mutation
His 307	-	expression tag
His 308	-	expression tag
His 309	-	expression tag
His 310	-	expression tag
His 311	-	expression tag
His 312	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	1
	Total formula weight	35075.6
Non-Polymers*	Number of molecules	1
	Total formula weight	325.3
All*	Total formula weight	35400.9

*Water molecules are not included.