5A20

Structure of bacteriophage SPP1 head-to-tail interface filled with DNA and tape measure protein

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, B	PORTAL PROTEIN	polymer	503	57405.4	2	UniProt (P54309) Pfam (PF05133) In PDB	BACILLUS PHAGE SPP1	GENE PRODUCT 6, GP6, PORTAL VERTEX PROTEIN
2	C, D	15 PROTEIN	polymer	102	11629.4	2	UniProt (Q38584) Pfam (PF05135) In PDB	BACILLUS PHAGE SPP1	HEAD COMPLETION PROTEIN, GP15
3	E, F	HEAD COMPLETION PROTEIN GP16	polymer	109	12615.1	2	UniProt (O48446) Pfam (PF05521) In PDB	BACILLUS PHAGE SPP1
4	G	TAIL-TO-HEAD JOINING PROTEIN GP17	polymer	134	15025.0	1	UniProt (O48448) Pfam (PF11367) In PDB	BACILLUS PHAGE SPP1
5	H	MAJOR TAIL PROTEIN GP17.1	polymer	177	19172.9	1	UniProt (O48449) Pfam (PF06199) In PDB	BACILLUS PHAGE SPP1

Sequence modifications

A, B: 1 - 503 (UniProt: P54309)

PDB	External Database	Details
Lys 365	Asn 365	conflict

E, F: 1 - 109 (UniProt: O48446)

PDB	External Database	Details
Arg 6	Pro 6	conflict

Contents of the asymmetric unit

Polymers	Number of chains	8
	Total formula weight	197497.6
All*	Total formula weight	197497.6

*Water molecules are not included.