B12 METABOLISM IN HUMANS By NICOLE AURORA LEAL A ...

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126 Banerjee, R. V., N. L. Johnston, J. K. Sobeski, P. Datta and R. G. Matthews. 1989. Cloning and sequence analysis of the Escherichia coli metH gene encoding cobalamin-dependent methionine synthase and isolation of a tryptic fragment containing the cobalamin-binding domain. J. Biol. Chem. 264:13888-95. Banerjee, R. V. and R. G. Matthews. 1990. Cobalamin-dependent methionine synthase. Faseb. J. 4:1450-9. Barker, H. A., H. Weisbach and R. D. Smyth. 1958. A Coenzyme containing pseudovitamin B12. Proc. Natl. Acad. Sci. U S A 44:1039-1097. Battersby, A. R. 1994. How nature builds the pigments of life: the conquest of vitamin B12. Science 264:1551-7. Bauer, C. B., M. V. Fonseca, H. M. Holden, J. B. Thoden, T. B. Thompson, J. C. Escalante-Semerena and I. Rayment. 2001. Three-dimensional structure of ATP:corrinoid adenosyltransferase from Salmonella typhimurium in its free state, complexed with MgATP, or complexed with hydroxycobalamin and MgATP. Biochemistry 40:361-74. Berkowitz, D., J. Hushon, H. Whitfield, Jr., J. Roth and B. Ames. 1968. Procedure for identifying nonsense mutations. J. Bacteriol. 96:215-220. Bobik, T. A., M. Ailion and J. R. Roth. 1992. A single regulatory gene integrates control of vitamin B12 synthesis and propanediol degradation. J. Bacteriol. 174:2253-66. Bobik, T. A., G. D. Havemann, R. J. Busch, D. S. Williams and H. C. Aldrich. 1999. The propanediol utilization (pdu) operon of Salmonella enterica serovar Typhimurium LT2 includes genes necessary for the formation of polyhedral organelles involved in coenzyme B 12-dependent 1,2-propanediol degradation. J. Bacteriol. 181:5967-5975. Bobik, T. A. and M. E. Rasche. 2003. HPLC assay for methylmalonyl-CoA epimerase. Anal. Bioanal. Chem. 375:344-9. Bobik, T. A. and R. S. Wolfe. 1989. Activation of formylmethanofuran synthesis in cell extracts of Methanobacterium thermoautotrophicum. J. Bacteriol. 171:1423-1427. Bobik, T. A., Y. Xu, R. M. Jeter, K. E. Otto and J. R. Roth. 1997. Propanediol utilization genes (pdu) of Salmonella typhimurium: three genes for the propanediol dehydratase. J. Bacteriol. 179:6633-9. Booker, S., S. Licht, J. Broderick and J. Stubbe. 1994. Coenzyme B12-dependent ribonucleotide reductase: evidence for the participation of five cysteine residues in ribonucleotide reduction. Biochemistry 33:12676-85.
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B12 METABOLISM IN HUMANS By NICOLE
Page 3 and 4:
The work in this dissertation is de
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TABLE OF CONTENTS Page ACKNOWLEDGME
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General Molecular and Protein Metho
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LIST OF TABLES Table page 1-1. Aden
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3-7. Stoichiometry of the MSR-ATR s
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DTT dithiothreitol E. coli Escheric
Page 15 and 16:
Abstract of Dissertation Presented
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CHAPTER 1 INTRODUCTION History of C
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3 (DMB). The DMB moiety is covalent
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5 and deoxyadenosine. After hydroge
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7 homocysteine recycling and methio
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methylmalonic acid. Methylmalonic a
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folate-dependent reactions includin
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tetanomorphum, P. shermanii, Euglen
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enzyme. This suggests that cob(II)a
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at the 5’-C of ATP by cob(I)alami
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iochemical studies and complementat
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1997). Both cases of the cblD disor
Page 39 and 40:
23 The cblB complementation group i
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(Watkins et al. 2002). Some patient
Page 43 and 44:
Chapter 2 of this dissertation repo
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Corrin Ring Dimethyl benzimidazole
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Classes Eliminases Dehydratases OH
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A) B) CH 3THF 33 MS-cob(I)alamin Me
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propanol dehydrogenase (PduQ) propa
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or from mutations that impair the a
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1989). 5-bromo-4-chloro-3-indolyl-
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41 5’-GCCGCCGGTACCGATGACGACGACAAG
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43 Growth of Adenosyltransferase Ex
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anti-rabbit IgG (γ-chain specific)
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sequence similarity to a known ATR
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ATRs were produced as fusion protei
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51 of the lacI repressor (not shown
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in which proteins bind B12, the "ba
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libraries may be particularly usefu
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57 Figure 2-1. Multiple sequence al
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Table 2-2. Specific activities of b
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61 1 2 3 4 5 25 kDa Figure 2-4. Wes
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63 (cyanocobalamin, CNCbl) and hydr
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65 5’- triphosphate (ATP), and di
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extracts of ATR 239K (160 mg protei
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Milford, MA). Samples (200 µl) wer
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Linearity of the ATR reaction 71 Th
Page 89 and 90:
73 reactions was characteristic of
Page 91 and 92: 75 MSR Produces little Cob(I)alamin
Page 93 and 94: Johnson et al. 2001, Saridakis et a
Page 95 and 96: AdoCbl by the MSR-ATR system. Exper
Page 97 and 98: propionyl-CoA PCC (2S)-methylmalony
Page 99 and 100: kDa 97 66 45 31 21 14 7 83 1 2 3 4
Page 101 and 102: 85 Table 3-3. The MSR-ATR system se
Page 103 and 104: Absorbance 0.5 0.4 0.3 0.2 0.1 0.0
Page 105 and 106: Wavelength, (525 nm) 0.24 0.23 0.22
Page 107 and 108: Activity, (nmol min-1 Activity, (nm
Page 109 and 110: al. 1988). The aldehyde is then dis
Page 111 and 112: CoA-acylating propionaldehyde dehyd
Page 113 and 114: 97 previously published DNA sequenc
Page 115 and 116: mM CHES (2-[N-cyclohexylamino]ethan
Page 117 and 118: 101 For the conjugation step, strai
Page 119 and 120: 103 from New England Biolabs (Bever
Page 121 and 122: 105 Propionaldehyde Dehydrogenase A
Page 123 and 124: 107 fraction. Following centrifugat
Page 125 and 126: 109 antiserum obtained was specific
Page 127 and 128: 111 biochemical evidence was presen
Page 129 and 130: 113 Table 4-1. Bacterial strains Sp
Page 131 and 132: 115 Table 4-3. Propionaldehyde dehy
Page 133 and 134: kDa 209 80 49 35 29 117 1 2 3 4 Fig
Page 135 and 136: CHAPTER 5 CONCLUSIONS In humans, co
Page 137 and 138: 121 substitutions that are common p
Page 139 and 140: 123 Studies also indicated that hum
Page 141: LIST OF REFERENCES Aberg, A., S. Ha
Page 145 and 146: 129 Fenton, W. A. and L. E. Rosenbe
Page 147 and 148: 131 Johnson, C. L. V. J., E. Pechon
Page 149 and 150: 133 Mellman, I., H. F. Willard and
Page 151 and 152: 135 Rossi, M., J. P. Glusker, L. Ra
Page 153 and 154: 137 Vlasie, M., S. Chowdhury and R.
Page 155 and 156: BIOGRAPHICAL SKETCH Nicole Aurora L
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