Crystal structures of monkey and mouse nicotinamide N-methyltransferase (NNMT) bound with end product, 1-methyl nicotinamide
Nicotinamide N-methyltransferase (NNMT) is a S-adenosyl-l-methionine (SAM)-dependent enzyme that catalyzes N-methylation of nicotinamide (NA) and other pyridines to form N-methyl pyridinium ions. Here we report the first ternary complex X-ray crystal structures of monkey NNMT and mouse NNMT in bound...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
16 September 2017
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| In: |
Biochemical and biophysical research communications
Year: 2017, Volume: 491, Issue: 2, Pages: 416-422 |
| ISSN: | 1090-2104 |
| DOI: | 10.1016/j.bbrc.2017.07.087 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1016/j.bbrc.2017.07.087 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S0006291X17314377 
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| Author Notes: | Srinivasan Swaminathan, Swarnakumari Birudukota, Manish Kumar Thakur, Reejuana Parveen, Saravanan Kandan, Suresh Juluri, Shama Shaik, Niranjan Naranapura Anand, Raghunadha Reddy Burri, Rajendra Kristam, Mahanandeesha Siddappa Hallur, Sridharan Rajagopal, Herman Schreuder, Thomas Langer, Christine Rudolph, Sven Ruf, Saravanakumar Dhakshinamoorthy, Ramachandraiah Gosu, Aimo Kannt |
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| 245 | 1 | 0 | |a Crystal structures of monkey and mouse nicotinamide N-methyltransferase (NNMT) bound with end product, 1-methyl nicotinamide |c Srinivasan Swaminathan, Swarnakumari Birudukota, Manish Kumar Thakur, Reejuana Parveen, Saravanan Kandan, Suresh Juluri, Shama Shaik, Niranjan Naranapura Anand, Raghunadha Reddy Burri, Rajendra Kristam, Mahanandeesha Siddappa Hallur, Sridharan Rajagopal, Herman Schreuder, Thomas Langer, Christine Rudolph, Sven Ruf, Saravanakumar Dhakshinamoorthy, Ramachandraiah Gosu, Aimo Kannt |
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| 520 | |a Nicotinamide N-methyltransferase (NNMT) is a S-adenosyl-l-methionine (SAM)-dependent enzyme that catalyzes N-methylation of nicotinamide (NA) and other pyridines to form N-methyl pyridinium ions. Here we report the first ternary complex X-ray crystal structures of monkey NNMT and mouse NNMT in bound form with the primary endogenous product, 1-methyl nicotinamide (MNA) and demethylated cofactor, S-adenosyl-homocysteine (SAH) determined at 2.30 Å and 1.88 Å respectively. The structural fold of these enzymes is identical to human NNMT. It is known that the primary endogenous product catalyzed by NNMT, MNA is a specific inhibitor of NNMT. Our data clearly indicates that the MNA binds to the active site and it would be trapped in the active site due to the formation of the bridge between the pole (long helix, α3) and long C-terminal loop. This might explain the mechanism of MNA acting as a feedback inhibitor of NNMT. | ||
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