Analogues of cobalamin (Cbl; vitamin B12) are prevalent in nature as a result of bacterial synthesis, and are of additional interest because of their potential use as antimetabolites and chemotherapeutic agents. We have synthesized 14 Cbl analogues containing 57Co and have compared their gastrointestinal absorption, plasma transport, and cellular retention to that of [58Co]Cbl in rabbits.
J. Fred Kolhouse, Robert H. Allen
Title and authors | Publication | Year |
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Challenges in the determination of total vitamin B12 by cyanidation conversion: insights from stable isotope dilution assays.
Wang M, Schuster K, Asam S, Rychlik M |
Analytical and Bioanalytical Chemistry | 2023 |
Protein binding assays for an accurate differentiation of vitamin B12 from its inactive analogue. A study on edible cricket powder.
Fedosov SN, Nexo E, Heegaard CW, Goldin J, Mason JB |
2023 | |
Development of Stable Isotope Dilution Assays for the Analysis of Natural Forms of Vitamin B12 in Meat
M Wang, S Asam, J Chen, M Rychlik |
Journal of Agricultural and Food Chemistry | 2021 |
Vitamin B 12 Carboxylic Acid Characterization in the Viscera Edible Portions of Lobster, Crayfish, Crab, and Shrimp
K Koseki, N Okamoto, Y Ito, T Bito, A Ishihara, Y Umebayashi, F Watanabe |
2021 | |
Naturally occurring cobalamin (B12) analogs can function as cofactors for human methylmalonyl-CoA mutase
OM Sokolovskaya, T Plessl, H Bailey, S Mackinnon, MR Baumgartner, WW Yue, DS Froese, ME Taga |
Biochimie | 2020 |
Determination and characterization of vitamin B12 in the muscles and head innards of edible shrimp
N Okamoto, N Hamaguchi, Y Umebayashi, S Takenaka, T Bito, F Watanabe |
Fisheries Science | 2020 |
Naturally occurring cobalamin (B12) analogs can function as cofactors for human methylmalonyl-CoA mutase.
Sokolovskaya OM, Plessl T, Bailey H, Mackinnon S, Baumgartner MR, Yue WW, Froese DS, Taga ME |
Biochimie | 2020 |
Structure of the human transcobalamin beta domain in four distinct states
JS Bloch, M Ruetz, B Kräutler, KP Locher, EA Permyakov |
PloS one | 2017 |
Euglena: Biochemistry, Cell and Molecular Biology
SD Schwartzbach, S Shigeoka |
2017 | |
Cellular uptake of metallated cobalamins
MT Tran, S Stürup, IH Lambert, B Gammelgaard, E Furger, R Alberto |
Metallomics | 2016 |
Characterization and Quantitation of Vitamin B 12 Compounds in Various Chlorella Supplements
T Bito, M Bito, Y Asai, S Takenaka, Y Yabuta, K Tago, M Ohnishi, T Mizoguchi, F Watanabe |
Journal of Agricultural and Food Chemistry | 2016 |
Supplementing lactating dairy cows with a vitamin B12 precursor, 5,6-dimethylbenzimidazole, increases the apparent ruminal synthesis of vitamin B12
A Brito, J Chiquette, SP Stabler, RH Allen, CL Girard |
animal | 2014 |
Handbook of Vitamins, Fifth Edition
R Rucker, K Bauerly |
Handbook of Vitamins, Fifth Edition | 2013 |
Hydroxocobalamin association during cell culture results in pink therapeutic proteins
KM Prentice, R Gillespie, N Lewis, K Fujimori, R McCoy, J Bach, L Connell-Crowley, CM Eakin |
mAbs | 2013 |
Structural basis for universal corrinoid recognition by the cobalamin transport protein haptocorrin
E Furger, DC Frei, R Schibli, E Fischer, AE Prota |
The Journal of biological chemistry | 2013 |
Methods in Enzymology
JD Stone, AS Chervin, DH Aggen, DM Kranz |
Protein Engineering for Therapeutics Part B | 2012 |
Versatility in corrinoid salvaging and remodeling pathways supports corrinoid-dependent metabolism in Dehalococcoides mccartyi
S Yi, EC Seth, YJ Men, SP Stabler, RH Allen, L Alvarez-Cohen, ME Taga |
Applied and environmental microbiology | 2012 |
Ideas in Chemistry and Molecular Sciences: Where Chemistry Meets Life
P Ruiz-Sánchez |
Ideas in Chemistry and Molecular Sciences: Where Chemistry Meets Life | 2010 |
Sleisenger and Fordtran's Gastrointestinal and Liver Disease
C Högenauer, HF Hammer |
Sleisenger and Fordtran's Gastrointestinal and Liver Disease | 2010 |
The tinker, tailor, soldier in intracellular B12 trafficking
R Banerjee, C Gherasim, D Padovani |
Current Opinion in Chemical Biology | 2009 |
High concentrations of haptocorrin interfere with routine measurement of cobalamins in human serum and milk. A problem and its solution
DL Lildballe, TF Hardlei, LH Allen, E Nexo |
Clinical Chemistry and Laboratory Medicine | 2009 |
Apparent ruminal synthesis and intestinal disappearance of vitamin B12 and its analogs in dairy cows
CL Girard, DE Santschi, SP Stabler, RH Allen |
Journal of Dairy Science | 2009 |
Identification of cobalamin and cobalamin analogues along the gastrointestinal tract of dairy cows
CL Girard, R Berthiaume, SP Stabler, RH Allen |
Archives of Animal Nutrition | 2009 |
Preparation and biodistribution of32P-labelled hydroxocobalamin and comparison with57Co-labelled cobinamide and cyanocobalamin
R Gräsbeck, M Sarparanta |
Journal of Labelled Compounds and Radiopharmaceuticals | 2008 |
Identification and quantitation of cobalamin and cobalamin analogues in human feces
RH Allen, SP Stabler |
The American journal of clinical nutrition | 2008 |
Crystal structure of human intrinsic factor: Cobalamin complex at 2.6-A resolution
FS Mathews, MM Gordon, Z Chen, KR Rajashankar, SE Ealick, DH Alpers, N Sukumar |
Proceedings of the National Academy of Sciences | 2007 |
Effective oral delivery of insulin in animal models using vitamin B12-coated dextran nanoparticles
KB Chalasani, GJ Russell-Jones, AK Jain, PV Diwan, SK Jain |
Journal of Controlled Release | 2007 |
Structural study on ligand specificity of human vitamin B12 transporters
J Wuerges, S Geremia, L Randaccio |
Biochemical Journal | 2007 |
Crystallography of vitamin B12 proteins
L Randaccio, S Geremia, J Wuerges |
Journal of Organometallic Chemistry | 2007 |
Vitamin B 12 and B 12 -Proteins: Kräutler/Vitamin
E Nexø |
Vitamin B 12 and B 12 -Proteins: Kräutler/Vitamin | 2007 |
Handbook of Vitamins, Fourth Edition
D Mock |
Handbook of Vitamins, Fourth Edition | 2007 |
Mechanisms of Discrimination between Cobalamins and Their Natural Analogues during Their Binding to the Specific B 12 -Transporting Proteins
SN Fedosov, NU Fedosova, B Kräutler, E Nexø, TE Petersen |
Biochemistry | 2007 |
Cyanide detoxification by the cobalamin precursor cobinamide
KE Broderick, P Potluri, S Zhuang, IE Scheffler, VS Sharma, RB Pilz, GR Boss |
Experimental biology and medicine (Maywood, N.J.) | 2006 |
The nitric oxide scavenger cobinamide profoundly improves survival in a Drosophila melanogaster model of bacterial sepsis
KE Broderick, J Feala, A McCulloch, G Paternostro, VS Sharma, RB Pilz, GR Boss |
The FASEB Journal | 2006 |
X-ray structural chemistry of cobalamins
L Randaccio, S Geremia, G Nardin, J Wuerges |
Coordination Chemistry Reviews | 2006 |
Structural basis for mammalian vitamin B12 transport by transcobalamin
J Wuerges, G Garau, S Geremia, SN Fedosov, TE Petersen, L Randaccio |
Proceedings of the National Academy of Sciences | 2006 |
Biosynthesis of 32 P‐labelled hydroxocobalamin and a study of its behaviour in rats
R Grasbeck, S Ebara, J Aaltonen, S Pinnioja |
Scandinavian Journal of Clinical & Laboratory Investigation | 2004 |
Equilibrium and Kinetic Analyses of the Interactions between Vitamin B12 Binding Proteins and Cobalamins by Surface Plasmon Resonance
MJ Cannon, DG Myszka, JD Bagnato, DH Alpers, FG West, CB Grissom |
Analytical Biochemistry | 2002 |
Comparative Analysis of Cobalamin Binding Kinetics and Ligand Protection for Intrinsic Factor, Transcobalamin, and Haptocorrin
SN Fedosov, L Berglund, NU Fedosova, E Nexø, TE Petersen |
The Journal of biological chemistry | 2002 |
Longitudinal Concentrations of Vitamin B12 and Vitamin B12-binding Proteins during Uncomplicated Pregnancy
C Koebnick, UA Heins, PC Dagnelie, SN Wickramasinghe, ID Ratnayaka, T Hothorn, AB Pfahlberg, I Hoffmann, J Lindemans, C Leitzmann |
Clinical chemistry | 2002 |
Inactive Corrinoid-Compound Significantly Decreases in Spirulina platensis Grown in a Cobalt-Deficient Medium
F Watanabe, E Miyamoto, Y Nakano |
Journal of Agricultural and Food Chemistry | 2001 |
Vitamin B12 Levels During Prolonged Treatment With Proton Pump Inhibitors
CW Howden |
Journal of Clinical Gastroenterology | 2000 |
Modern Chromatographic Analysis Of Vitamins: Revised And Expanded
HJ Leis, G Fauler, W Muntean |
Modern Chromatographic Analysis Of Vitamins: Revised And Expanded | 2000 |
Conformational Changes of Transcobalamin Induced by Aquocobalamin Binding: MECHANISM OF SUBSTITUTION OF THE COBALT-COORDINATED GROUP IN THE BOUND LIGAND
SN Fedosov, NU Fedosova, E Nexø, TE Petersen |
The Journal of biological chemistry | 2000 |
Oral absorption of peptides through the cobalamin (vitamin B12) pathway in the rat intestine
J Alsenz, G J Russell-Jones, S Westwood, B Levet-Trafit, P C de Smidt |
Pharmaceutical Research | 2000 |
Sequence, S–S Bridges, and Spectra of Bovine Transcobalamin Expressed in Pichia pastoris
SN Fedosov, L Berglund, E Nexø, TE Petersen |
The Journal of biological chemistry | 1999 |
Dried Green and Purple Lavers (Nori) Contain Substantial Amounts of Biologically Active Vitamin B 12 but Less of Dietary Iodine Relative to Other Edible Seaweeds
F Watanabe, S Takenaka, H Katsura, SA Masumder, K Abe, Y Tamura, Y Nakano |
Journal of Agricultural and Food Chemistry | 1999 |
Pseudovitamin B 12 Is the Predominant Cobamide of an Algal Health Food, Spirulina Tablets
F Watanabe, H Katsura, S Takenaka, T Fujita, K Abe, Y Tamura, T Nakatsuka, Y Nakano |
Journal of Agricultural and Food Chemistry | 1999 |
Evaluation of coupling of cobalamin to antisense oligonucleotides by thin-layer and reversed-phase liquid chromatography
M Guy, A Olszewski, N Monhoven, F Namour, JL Guéant, F Plénat |
Journal of Chromatography B Biomedical Sciences and Applications | 1998 |
Molecular basis for dysfunction of some mutant forms of methylmalonyl-CoA mutase: deductions from the structure of methionine synthase
CL Drennan, RG Matthews, DS Rosenblatt, FD Ledley, WA Fenton, ML Ludwig |
Proceedings of the National Academy of Sciences | 1996 |
Transcobalamin from cow milk: isolation and physico-chemical properties
SN Fedosov, TE Petersen, E Nexø |
Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology | 1996 |
Synthesis and Characterization of a Novel Green Cobalt Corrinoid 1
KL Brown, S Cheng, JD Zubkowski, EJ Valente |
Inorganic Chemistry | 1996 |
Synthesis of Cobalamin−Biotin Conjugates That Vary in the Position of Cobalamin Coupling. Evaluation of Cobalamin Derivative Binding to Transcobalamin II
PM Pathare, DS Wilbur, S Heusser, EV Quadros, P McLoughlin, AC Morgan |
Bioconjugate Chemistry | 1996 |
5 Gastric intrinsic factor and its receptor
JP Nicolas, JL Guéant |
Baillière's Clinical Haematology | 1995 |
Synthesis of LHRH Antagonists Suitable for Oral Administration via the Vitamin B 12 Uptake System
G Russell-Jones, S Westwood, P Farnworth, J Findlay, H Burger |
Bioconjugate Chemistry | 1995 |
Dual enzyme labels for simultaneous heterogeneous enzyme-linked competitive binding assays
JM Buckwalter, X Guo, ME Meyerhoff |
Analytica Chimica Acta | 1994 |
Recent advances in elucidation of biological corrinoid functions
E Stupperich |
FEMS Microbiology Reviews | 1993 |
The Sources and Biochemical Characteristics of Cobalamin-Binders in Human Amniotic Fluid*
K Nakamura, N Sagawa, T Mori |
Asia-Oceania Journal of Obstetrics and Gynaecology | 1993 |
Isolation and sequence analysis of variant forms of human transcobalamin II
N Li, S Seetharam, J Lindemans, DH Alpers, F Arwert, B Seetharam |
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression | 1993 |
A radioisotope dilution method for quantitation of total vitamin B12 in biological samples using isolated Euglena pellicle fragments as a solid-phase vitamin B12-binding material
F Watanabe, Y Nakano, E Stupperich, K Ushikoshi, S Ushikoshi, I Ushikoshi, S Kitaoka |
Analytical Chemistry | 1993 |
Development and application of an α-face-specific radioimmunoassay for vitamin B12
DG Kennedy, WJ Blanchflower, PB Young, WB Davidson |
Biological Trace Element Research | 1992 |
EFFECT OF pH ON BINDING OF B12TO IF AND R-PROTEIN
NA Sourial, AH Waters |
British Journal of Haematology | 1992 |
Human epidermal growth factor—on molecular forms present in urine and blood
E Nexø, PE Jørgensen, MR Hansen |
Regulatory Peptides | 1992 |
Identification of vitamin B12 and analogues by high- performance capillary electrophoresis and comparison with high-performance liquid chromatography
D Lambert, C Adjalla, F Felden, S Benhayoun, JP Nicolas, JL Guéant |
Journal of Chromatography A | 1992 |
Biochemical Pharmacology of Blood and Bloodforming Organs
JW Fisher |
1992 | |
Inhibition of cobalamin-dependent enzymes by cobalamin analogues in rats
SP Stabler, EP Brass, PD Marcell, RH Allen |
Journal of Clinical Investigation | 1991 |
Molecular recognition in the binding of vitamin B12 by the cobalamin-specific Intrinsic Factor
ER Andrews, JM Pratt, KL Brown |
FEBS Letters | 1991 |
Effect of the cobalt-N coordination on the cobamide recognition by the human vitamin B12 binding proteins intrinsic factor, transcobalamin and haptocorrin
E STUPPERICH, E NEXO |
European Journal of Biochemistry | 1991 |
Portal and biliary phases of enterohepatic circulation of corrinoids in humans
SE Kholty, JL Gueant, L Bressler, M Djalali, P Boissel, P Gerard, JP Nicolas |
Gastroenterology | 1991 |
Vitamin B-12 content and bioavailability of spirulina and nori in rats
H van den Berg, L Brandsen, BJ Sinkeldam |
The Journal of Nutritional Biochemistry | 1991 |
The cDNA sequence and the deduced amino acid sequence of human transcobalamin II show homology with rat intrinsic factor and human transcobalamin I
O Platica, R Janeczko, EV Quadros, A Regec, R Romain, SP Rothenberg |
The Journal of biological chemistry | 1991 |
Mechanism of conversion of human apo- to holomethionine synthase by various forms of cobalamin
JF Kolhouse, C Utley, SP Stabler, RH Allen |
The Journal of biological chemistry | 1991 |
High-performance liquid chromatographic separation and dual competitive binding assay of corrinoids in biological material
M Djalali, JL Gueant, D Lambert, SE Kholty, M Saunier, JP Nicolas |
Journal of Chromatography B Biomedical Sciences and Applications | 1990 |
The Inhibitory Effect of Bile on the Binding of Vitamin B 12 to Intrinsic Factor: An in Vivo Study in Rats
Ø Bergesen, H Schjønsby, L Schjerven |
Scandinavian Journal of Gastroenterology | 1990 |
A new homogenous enzyme immunoassay using recombinant enzyme fragments
PL Khanna, RT Dworschack, WB Manning, JD Harris |
Clinica Chimica Acta | 1989 |
Folates and Cobalamins
BA Cooper, JA Zittoun |
1989 | |
Isolation and structural characterization of a cDNA clone encoding rat gastric intrinsic factor
BK Dieckgraefe, B Seetharam, L Banaszak, JF Leykam, DH Alpers |
Proceedings of the National Academy of Sciences | 1988 |
Cobalamin and folate metabolism in helminths
PP Weinstein, JJ Jaffe |
Blood Reviews | 1987 |
8 Non-enzymatic Vitamin B12 Binding Proteins in Man and Animals
Z Schneider |
Comprehensive B 12 Chemistry Biochemistry Nutrition Ecology Medicine | 1987 |
Plasma R Binder Deficiency and Neurologic Disease
SH Sigal, CA Hall, JP Antel |
New England Journal of Medicine | 1987 |
Homogeneous enzyme-linked assay for Vitamin B12
CD Tsalta, ME Meyerhoff |
Analytical Chemistry | 1987 |
Megaloblastic anaemia due to vitamin B12deficiency caused by small intestinal bacterial overgrowth: possible role of vitamin B12analogues
MF Murphy, NA Sourial, JF Burman, DV Doyle, S Tabaqchali, DL Mollin |
British Journal of Haematology | 1986 |
A patient with the inability to maintain in vivo levels of bound cobalamin (Cbl) and manifestations of tissue deficiency of Cbl
JA Begley, PT Burkart, CA Hall |
American Journal of Hematology | 1986 |
Determination of metabolically active B12 and inactive B12 analog titers in human blood using several microbial reagents and a radiodilution assay
H Baker, O Frank, F Khalil, B DeAngelis, SH Hutner |
Journal of the American College of Nutrition | 1986 |
The isolation, characterization, and comparison of the membrane-associated and soluble folate-binding proteins from human KB cells
PC Elwood, MA Kane, RM Portillo, JF Kolhouse |
The Journal of biological chemistry | 1986 |
Cellular Uptake of Cobalamin
B Seetharam, DH Alpers |
Nutrition Reviews | 1985 |
Vitamin B12 absorption in the neonatal piglet
NM Trugo, JE Ford, DN Salter |
British Journal of Nutrition | 1985 |
Effect of pancreatic extracts on the faecal excretion and on the serum concentration of cobalamin and cobalamin analogues in cystic fibrosis
JL Gueant, M Vidailhet, C Pasquet, M Djalali, JP Nicolas |
Clinica Chimica Acta | 1984 |
REMOVAL OF COBALAMIN ANALOGUE IN BILE BY ENTEROHEPATIC CIRCULATION OF VITAMIN B12
S Kanazawa, V Herbert, B Herzlich, G Drivas, C Manusselis |
Lancet | 1983 |
Characterization of cobalamin receptor sites in brush-border plasma membranes of the tapeworm Spirometra mansonoides
PA Friedman, PP Weinstein, JF Mueller, RH Allen |
The Journal of biological chemistry | 1983 |
Presence and formation of cobalamin analogues in multivitamin-mineral pills
H Kondo, MJ Binder, JF Kolhouse, WR Smythe, ER Podell, RH Allen |
Journal of Clinical Investigation | 1982 |
High-pressure liquid chromatography of cobalamins and cobalamin analogs
M Binder, JF Kolhouse, KC van Horne, RH Allen |
Analytical Biochemistry | 1982 |
125I-labelled cobalamin derivative compatible with intrinsic factor
TM Houts |
Clinica Chimica Acta | 1982 |
Vitamin B 12 Binders (Transcobalamins) in Serum
F Fernandes-Costa, J Metz, CA Hall |
Critical Reviews in Clinical Laboratory Sciences | 1982 |
Isolation, characterization, and comparison of the solubilized particulate and soluble folate binding proteins from human milk
AC Antony, CS Utley, PD Marcell, JF Kolhouse |
The Journal of biological chemistry | 1982 |
Nitrous oxide has multiple deleterious effects on cobalamin metabolism and causes decreases in activities of both mammalian cobalamin-dependent enzymes in rats
H Kondo, ML Osborne, JF Kolhouse, MJ Binder, ER Podell, CS Utley, RS Abrams, RH Allen |
Journal of Clinical Investigation | 1981 |
Insolubilized pure human intrinsic factor used for quantitation of cobalamins in serum
E Nexø, P Gimsing |
Scandinavian Journal of Clinical & Laboratory Investigation | 1981 |
Forms of vitamin B12 in radioisotope dilution assays
JA Begley, CA Hall |
Journal of clinical pathology | 1981 |
Isolation and characterization of a folate receptor from human placenta
AC Antony, C Utley, KC Horne, JF Kolhouse |
The Journal of biological chemistry | 1981 |
Presence of cobalamin analogues in animal tissues
H Kondo, JF Kolhouse, RH Allen |
Proceedings of the National Academy of Sciences | 1980 |
Studies of a Patient with Megaloblastic Anemia and an Abnormal Transcobalamin II
PA Seligman, LD Steiner, RH Allen |
New England Journal of Medicine | 1980 |
Interlaboratory comparison of serum vitamin B12 assay
DL Mollin, AV Hoffbrand, PG Ward, SM Lewis |
Journal of clinical pathology | 1980 |
The Biochemistry of Glycoproteins and Proteoglycans
WJ Lennarz |
1980 | |
Development of a dual label Schilling test for pancreatic exocrine function based on the differential absorption of cobalamin bound to intrinsic factor and R protein
WR Brugge, JS Goff, NC Allen, ER Podell, RH Allen |
Gastroenterology | 1980 |
Validity of Transcobalamin II-Based Radioassay for the Determination of Serum Vitamin B 12 Concentrations
G Paltridge, Z Rudzki, RG Ryall |
Annals of Clinical Biochemistry | 1980 |
Molecular-biological and biochemical aspects of the search for new drug preparations among analogs of vitamin B12 (literature survey)
AA Poznanskaya |
Pharmaceutical Chemistry Journal | 1979 |
Effect of Proteolytic Enzymes on the Binding of Cobalamin to R Protein and Intrinsic Factor IN VITRO EVIDENCE THAT A FAILURE TO PARTIALLY DEGRADER PROTEIN IS RESPONSIBLE FOR COBALAMIN MALABSORPTION IN PANCREATIC INSUFFICIENCY
RH Allen, B Seetharam, E Podell, DH Alpers |
Journal of Clinical Investigation | 1978 |
Correction of Cobalamin Malabsorption in Pancreatic Insufficiency with a Cobalamin Analogue that Binds with High Affinity to R Protein but not to Intrinsic Factor IN VIVO EVIDENCE THAT A FAILURE TO PARTIALLY DEGRADE R PROTEIN IS RESPONSIBLE FOR COBALAM
RH Allen, B Seetharam, NC Allen, ER Podell, DH Alpers |
Journal of Clinical Investigation | 1978 |
Isolation of cobalamin and cobalamin analogs by reverse affinity chromatography
JF Kolhouse, RH Allen |
Analytical Biochemistry | 1978 |
Cobalamin Analogues Are Present in Human Plasma and Can Mask Cobalamin Deficiency because Current Radioisotope Dilution Assays Are Not Specific for True Cobalamin
JF Kolhouse, H Kondo, NC Allen, E Podell, RH Allen |
New England Journal of Medicine | 1978 |