Qin J - Search Results

1

Solution 1H nuclear magnetic resonance determination of the distal pocket structure of cyanomet complexes of genetically engineered sperm whale myoglobin His64 (E7)-->Val, Thr67 (E10)-->Arg. The role of distal hydrogen bonding by Arg67 (E10) in modulating ligand tilt.

Qin J, La Mar GN, Cutruzzolá F, Allocatelli CT, Brancaccio A, Brunori M. Qin J, et al. Biophys J. 1993 Nov;65(5):2178-90. doi: 10.1016/S0006-3495(93)81270-0. Biophys J. 1993. PMID: 8298042 Free PMC article.

The observed dipolar shifts for the E helix backbone protons and Phe43[CD1], together with steady-state nuclear Overhauser effect between the E helix and the heme, were analyzed to show that both the E helix and Phe43[CD1] move slightly closer to the iron to minimize the vacancy …

The observed dipolar shifts for the E helix backbone protons and Phe43[CD1], together with steady-state nuclear Overhauser effect between th …

2

Complete sequence-specific 1H NMR resonance assignment of hyperfine-shifted residues in the active site of a paramagnetic protein: application to Aplysia cyano-metmyoglobin.

Qin J, La Mar GN. Qin J, et al. J Biomol NMR. 1992 Nov;2(6):597-618. doi: 10.1007/BF02192849. J Biomol NMR. 1992. PMID: 1490108

3

Solution 1H nuclear magnetic resonance determination of hydrogen bonding of the E10 (66) Arg side-chain to the bound ligand in Aplysia cyano-met myoglobin.

Qin J, La Mar GN, Ascoli F, Bolognesi M, Brunori M. Qin J, et al. J Mol Biol. 1992 Apr 20;224(4):891-7. doi: 10.1016/0022-2836(92)90456-t. J Mol Biol. 1992. PMID: 1569577

4

Correlation between the steric bulk of the distal E7 and E11 residues and the tilt of the FeCN unit in cyanometmyoglobin as determined by NMR from the orientation of the magnetic axes in single and double point mutants.

Rajarathnam K, Qin J, La Mar GN, Chiu ML, Sligar SG. Rajarathnam K, et al. Among authors: qin j. Biochemistry. 1994 May 10;33(18):5493-501. doi: 10.1021/bi00184a018. Biochemistry. 1994. PMID: 8180171

5

1H NMR study of the dynamics of the pH modulation of axial coordination in Aplysia limacina (Val(E7)) and sperm whale double mutant His(E7)-->Val,Thr(E10)-->Arg metmyoglobin.

Qin J, Pande U, La Mar GN, Ascoli F, Ascenzi P, Cutruzzolá F, Travaglini-Allocatelli C, Brunori M. Qin J, et al. J Biol Chem. 1993 Nov 15;268(32):24012-21. J Biol Chem. 1993. PMID: 8226945 Free article.

6

1H NMR study of the solution molecular and electronic structure of engineered distal myoglobin His64(E7) Val/Val68(E11) His double mutant. Coordination of His64(E11) at the sixth position in both low-spin and high-spin states.

Qin J, La Mar GN, Dou Y, Admiraal SJ, Ikeda-Saito M. Qin J, et al. J Biol Chem. 1994 Jan 14;269(2):1083-90. J Biol Chem. 1994. PMID: 8288565 Free article.

7

Solution nuclear magnetic resonance determination of active site structure for a paramagnetic protein: cyanomet Aplysia myoglobin.

Qin J, La Mar GN, Ascoli F, Brunori M. Qin J, et al. J Mol Biol. 1993 Jun 20;231(4):1009-23. doi: 10.1006/jmbi.1993.1348. J Mol Biol. 1993. PMID: 8390582

8

Solution structure determination of the heme cavity in the E7 His-->Val cyano-met myoglobin point mutant based on the 1H NMR detected dipolar field of the iron: evidence for contraction of the heme pocket.

Rajarathnam K, Qin J, La Mar GN, Chiu ML, Sligar SG. Rajarathnam K, et al. Among authors: qin j. Biochemistry. 1993 Jun 1;32(21):5670-80. doi: 10.1021/bi00072a024. Biochemistry. 1993. PMID: 8504086

9

Structural and functional characterization of sperm whale myoglobin mutants: role of arginine (E10) in ligand stabilization.

Allocatelli CT, Cutruzzolà F, Brancaccio A, Brunori M, Qin J, La Mar GN. Allocatelli CT, et al. Among authors: qin j. Biochemistry. 1993 Jun 15;32(23):6041-9. doi: 10.1021/bi00074a015. Biochemistry. 1993. PMID: 8507640

Arg(E10) was previously found to form a hydrogen bond with the ligand in fluoro-, azido- and cyanomet derivatives of Aplysia limacina myoglobin, which lacks the distal His(E7) [Qin, J., La Mar, G. N., Ascoli, F., Bolognesi, M., & Brunori, M. (1992) J. ...

Arg(E10) was previously found to form a hydrogen bond with the ligand in fluoro-, azido- and cyanomet derivatives of Aplysia limacina myoglo …

10

Structures of thiolate- and carboxylate-ligated ferric H93G myoglobin: models for cytochrome P450 and for oxyanion-bound heme proteins.

Qin J, Perera R, Lovelace LL, Dawson JH, Lebioda L. Qin J, et al. Biochemistry. 2006 Mar 14;45(10):3170-7. doi: 10.1021/bi052171s. Biochemistry. 2006. PMID: 16519512 Free PMC article.

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