Abstract
The crystal structure of sperm whale myoglobin (Mb):azide complex has been determined and refined at 1.8 Å resolution. The ligand is coordinated to the heme iron, and deeply buried in the inner part of the distal site. The structural organization of this complex differs substantially from that observed in A. limacina Mb: azide complex, in which the iron coordinated ligand is directed towards the outer solvent region of the protein. In the case of sperm whale Mb the bound ligand is stabilized by a hydrogen bond to residue HisE7; in the case of A. limacina Mb the ligand is directly hydrogen bonded to ArgE10. The structures of the complexes described underline different mechanisms of ligand recognition and stabilization in the two Mb's, and allow a rational interpretation of the different kinetic and thermodynamic properties observed in globins lacking a polar residue at the distal E7 site.
| Original language | English |
|---|---|
| Pages (from-to) | 65-73 |
| Number of pages | 9 |
| Journal | Rendiconti Lincei |
| Volume | 4 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - Mar 1993 |
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Keywords
- Biocrystallography: Protein:ligand interactions
- Heme proteins
- Myoglobin
- Protein structure
ASJC Scopus subject areas
- Engineering(all)
- Environmental Science(all)
- Earth and Planetary Sciences(all)
- Agricultural and Biological Sciences(all)
Cite this
Molecular bases for heme : ligand recognition in sperm whale (Physeter Catodon) and Aplysia limacine myoglobin. / Rizzi, Menico; Ascenzi, Paolo; Coda, Alessandro; Brunori, Maurizio; Bolognesi, Martino.
In: Rendiconti Lincei, Vol. 4, No. 1, 03.1993, p. 65-73.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Molecular bases for heme
T2 - ligand recognition in sperm whale (Physeter Catodon) and Aplysia limacine myoglobin
AU - Rizzi, Menico
AU - Ascenzi, Paolo
AU - Coda, Alessandro
AU - Brunori, Maurizio
AU - Bolognesi, Martino
PY - 1993/3
Y1 - 1993/3
N2 - The crystal structure of sperm whale myoglobin (Mb):azide complex has been determined and refined at 1.8 Å resolution. The ligand is coordinated to the heme iron, and deeply buried in the inner part of the distal site. The structural organization of this complex differs substantially from that observed in A. limacina Mb: azide complex, in which the iron coordinated ligand is directed towards the outer solvent region of the protein. In the case of sperm whale Mb the bound ligand is stabilized by a hydrogen bond to residue HisE7; in the case of A. limacina Mb the ligand is directly hydrogen bonded to ArgE10. The structures of the complexes described underline different mechanisms of ligand recognition and stabilization in the two Mb's, and allow a rational interpretation of the different kinetic and thermodynamic properties observed in globins lacking a polar residue at the distal E7 site.
AB - The crystal structure of sperm whale myoglobin (Mb):azide complex has been determined and refined at 1.8 Å resolution. The ligand is coordinated to the heme iron, and deeply buried in the inner part of the distal site. The structural organization of this complex differs substantially from that observed in A. limacina Mb: azide complex, in which the iron coordinated ligand is directed towards the outer solvent region of the protein. In the case of sperm whale Mb the bound ligand is stabilized by a hydrogen bond to residue HisE7; in the case of A. limacina Mb the ligand is directly hydrogen bonded to ArgE10. The structures of the complexes described underline different mechanisms of ligand recognition and stabilization in the two Mb's, and allow a rational interpretation of the different kinetic and thermodynamic properties observed in globins lacking a polar residue at the distal E7 site.
KW - Biocrystallography: Protein:ligand interactions
KW - Heme proteins
KW - Myoglobin
KW - Protein structure
UR - http://www.scopus.com/inward/record.url?scp=0002978901&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0002978901&partnerID=8YFLogxK
U2 - 10.1007/BF03001186
DO - 10.1007/BF03001186
M3 - Article
VL - 4
SP - 65
EP - 73
JO - ATTI Della Accademia Nazionale Dei Lincei Rendiconti Lincei Scienze Fisiche E Naturali
JF - ATTI Della Accademia Nazionale Dei Lincei Rendiconti Lincei Scienze Fisiche E Naturali
SN - 2037-4631
IS - 1
ER -