1HAC | pdb_00001hac

CROSSLINKED HAEMOGLOBIN

PDB DOI: https://doi.org/10.2210/pdb1HAC/pdb

Classification: OXYGEN TRANSPORT
Organism(s): Homo sapiens
Mutation(s): No

Deposited: 1996-03-13 Released: 1997-11-12
Deposition Author(s): Schumacher, M.A., Dixon, M.M., Kluger, R., Jones, R.T., Brennan, R.G.

Experimental Data Snapshot

Method: X-RAY DIFFRACTION
Resolution: 2.60 Å
R-Value Work:
0.154 (Depositor)

wwPDB Validation 3D Report Full Report

This is version 1.3 of the entry. See complete history.

Literature

Allosteric intermediates indicate R2 is the liganded hemoglobin end state.

Schumacher, M.A., Zheleznova, E.E., Poundstone, K.S., Kluger, R., Jones, R.T., Brennan, R.G.

(1997) Proc Natl Acad Sci U S A 94: 7841-7844

PubMed: 9223274 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1073/pnas.94.15.7841
Primary Citation Related Structures:
1HAB, 1HAC

PubMed Abstract:
Hemoglobin has been a long-standing paradigm for understanding protein allostery. Here, the x-ray structures of two chemically crosslinked, fully liganded hemoglobins, alpha2beta82CA82beta and alpha2beta82ND82beta, are described at 2.3 A and 2.6 A resolution, respectively. Strikingly, these crosslinked hemoglobins assume intermediate conformations that lie between those of R and the controversial liganded hemoglobin state R2 rather than between R and T. Thus, these structures support only a T left and right arrow R left and right arrow R2 allosteric pathway and underscore the physiological importance of the R2 conformation.

Organizational Affiliation

Department of Biochemistry and Molecular Biology, Oregon Health Sciences University, 3181 SW Sam Jackson Park Road, Portland, OR 97201-3098, USA.

Macromolecule Content

Total Structure Weight: 64.88 kDa
Atom Count: 4,623
Modeled Residue Count: 574
Deposited Residue Count: 574
Unique protein chains: 2

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOGLOBIN A	A, C	141	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens) Explore P69905 Go to UniProtKB: P69905
PHAROS: P69905 GTEx: ENSG00000188536 ENSG00000206172
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P69905
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOGLOBIN A	B, D	146	Homo sapiens	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens) Explore P68871 Go to UniProtKB: P68871
PHAROS: P68871 GTEx: ENSG00000244734
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P68871
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
HEM Query on HEM Download:Ideal Coordinates CCD File SDF format, chain E [auth A] SDF format, chain G [auth B] SDF format, chain J [auth C] SDF format, chain L [auth D] MOL2 format, chain E [auth A] MOL2 format, chain G [auth B] MOL2 format, chain J [auth C] MOL2 format, chain L [auth D] mmCIF format, chain E [auth A] mmCIF format, chain G [auth B] mmCIF format, chain J [auth C] mmCIF format, chain L [auth D]	E [auth A], G [auth B], J [auth C], L [auth D]	PROTOPORPHYRIN IX CONTAINING FE C₃₄ H₃₂ Fe N₄ O₄ KABFMIBPWCXCRK-RGGAHWMASA-L		Interactions Focus chain E [auth A] Focus chain G [auth B] Focus chain J [auth C] Focus chain L [auth D]
NDD Query on NDD Download:Ideal Coordinates CCD File SDF format, chain I [auth B] MOL2 format, chain I [auth B] mmCIF format, chain I [auth B]	I [auth B]	2,6-DICARBOXYNAPHTHALENE C₁₂ H₈ O₄ RXOHFPCZGPKIRD-UHFFFAOYSA-N		Interactions Focus chain I [auth B]
CMO Query on CMO Download:Ideal Coordinates CCD File SDF format, chain F [auth A] SDF format, chain H [auth B] SDF format, chain K [auth C] SDF format, chain M [auth D] MOL2 format, chain F [auth A] MOL2 format, chain H [auth B] MOL2 format, chain K [auth C] MOL2 format, chain M [auth D] mmCIF format, chain F [auth A] mmCIF format, chain H [auth B] mmCIF format, chain K [auth C] mmCIF format, chain M [auth D]	F [auth A], H [auth B], K [auth C], M [auth D]	CARBON MONOXIDE C O UGFAIRIUMAVXCW-UHFFFAOYSA-N		Interactions Focus chain F [auth A] Focus chain H [auth B] Focus chain K [auth C] Focus chain M [auth D]

Experimental Data & Validation

Experimental Data

Method: X-RAY DIFFRACTION
Resolution: 2.60 Å
R-Value Work: 0.154 (Depositor)

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 86.84	α = 90
b = 87.11	β = 90
c = 97.63	γ = 90

Software Package:

Software Name	Purpose
TNT	refinement
ADSC	data collection

Structure Validation

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View more in-depth experimental data

Entry History

Deposition Data

Released Date: 1997-11-12

Deposition Author(s):

Revision History (Full details and data files)

Version 1.0: 1997-11-12
Type: Initial release
Version 1.1: 2008-03-03
Changes: Version format compliance
Version 1.2: 2011-07-13
Changes: Version format compliance
Version 1.3: 2024-11-20
Changes: Data collection, Database references, Derived calculations, Structure summary