2GTL

Lumbricus Erythrocruorin at 3.5A resolution

Entity

Entity ID	Chain ID	Description	Type	Chain length	Formula weight	Number of molecules	DB Name (Accession)	Biological source	Descriptive keywords
1	A, E, I	Extracellular globin 4	polymer	151	17567.0	3	UniProt (P13579) Pfam (PF00042) In PDB	Lumbricus terrestris (common earthworm)	Globin IV, Erythrocruorin, Globin A
2	B, F, J	Extracellular globin 2	polymer	145	16268.2	3	UniProt (P02218) Pfam (PF00042) In PDB	Lumbricus terrestris (common earthworm)	Globin II, Erythrocruorin, Globin AIII, Globin B
3	C, G, K	Extracellular globin-3	polymer	153	17331.8	3	UniProt (P11069) Pfam (PF00042) In PDB	Lumbricus terrestris (common earthworm)	Extracellular globin III, Erythrocruorin, Globin C
4	D, H, L	Hemoglobin chain d1	polymer	140	15988.3	3	UniProt (O61233) Pfam (PF00042) In PDB	Lumbricus terrestris (common earthworm)
5	M	Hemoglobin linker chain L1	polymer	217	24936.7	1	UniProt (Q9GV76) Pfam (PF00057) Pfam (PF16915) In PDB	Lumbricus terrestris (common earthworm)
6	N	Extracellular hemoglobin linker L2 subunit	polymer	220	25057.0	1	UniProt (Q2I743) Pfam (PF00057) Pfam (PF16915) In PDB	Lumbricus terrestris (common earthworm)
7	O	Extracellular hemoglobin linker L3 subunit	polymer	215	24486.0	1	UniProt (Q2I742) Pfam (PF16915) Pfam (PF00057) In PDB	Lumbricus terrestris (common earthworm)
8	G, H, I, J, K...	CARBON MONOXIDE	non-polymer		28.0	12	Chemie (CMO)
9	F, G, H, I, J...	PROTOPORPHYRIN IX CONTAINING FE	non-polymer		616.5	12	Chemie (HEM)
10	M, N, O	CALCIUM ION	non-polymer		40.1	4	Chemie (CA)
11	M	ZINC ION	non-polymer		65.4	1	Chemie (ZN)

Sequence modifications

A, E, I: 1 - 151 (UniProt: P13579)

PDB	External Database	Details
Lys 78	Asp 78	CONFLICT

B, F, J: 1 - 145 (UniProt: P02218)

PDB	External Database	Details
Asp 66	Glu 66	CONFLICT

C, G, K: 1 - 153 (UniProt: P11069)

PDB	External Database	Details
Glu 49	Asp 66	CONFLICT

O: 8 - 222 (UniProt: Q2I742)

PDB	External Database	Details
Cys 113	Val 131	CONFLICT

Contents of the asymmetric unit

Polymers	Number of chains	15
	Total formula weight	275945.6
Non-Polymers*	Number of molecules	29
	Total formula weight	7959.7
All*	Total formula weight	283905.3

*Water molecules are not included.