8ZRD

The complex structure of SARS-CoV-2 RBD and llama single-domain antibody S4

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, D (A, E)	Spike protein S1	polymer	220	24883.9	2	UniProt (P0DTC2) Pfam (PF09408)	Severe acute respiratory syndrome coronavirus 2
2	B, C (C, D)	llama single-domain antibody S4	polymer	144	16005.6	2		Lama glama
3	E, F (A, E)	2-acetamido-2-deoxy-beta-D-glucopyranose	non-polymer		221.2	2	Chemie (NAG)
4	G, H, I (A, D, E)	water	water		18.0	43	Chemie (HOH)

Sequence modifications

A, E: 319 - 529 (UniProt: P0DTC2)

PDB	External Database	Details
Ala 316	-	expression tag
Asp 317	-	expression tag
Pro 318	-	expression tag
His 530	-	expression tag
His 531	-	expression tag
His 532	-	expression tag
His 533	-	expression tag
His 534	-	expression tag
His 535	-	expression tag

Contents of the asymmetric unit

Polymers	Number of chains	4
	Total formula weight	81779.1
Non-Polymers*	Number of molecules	2
	Total formula weight	442.4
All*	Total formula weight	82221.5

*Water molecules are not included.