Role of vitamin K in intestinal health

Y Lai, H Masatoshi, Y Ma, Y Guo, B Zhang - Frontiers in Immunology, 2022 - frontiersin.org
Intestinal diseases, such as inflammatory bowel diseases (IBDs) and colorectal cancer
(CRC) generally characterized by clinical symptoms, including malabsorption, intestinal …

Diverse biological functions of vitamin K: from coagulation to ferroptosis

E Mishima, A Wahida, T Seibt, M Conrad - Nature metabolism, 2023 - nature.com
Vitamin K is essential for several physiological processes, such as blood coagulation, in
which it serves as a cofactor for the conversion of peptide-bound glutamate to γ …

Recent trends in the metabolism and cell biology of vitamin K with special reference to vitamin K cycling and MK-4 biosynthesis

MJ Shearer, P Newman - Journal of Lipid Research, 2014 - ASBMB
In contrast to other fat-soluble vitamins, dietary vitamin K is rapidly lost to the body resulting
in comparatively low tissue stores. Deficiency is kept at bay by the ubiquity of vitamin K in the …

[HTML][HTML] Structural and functional insights into enzymes of the vitamin K cycle

JK Tie, DW Stafford - Journal of Thrombosis and Haemostasis, 2016 - Elsevier
Vitamin K‐dependent proteins require carboxylation of certain glutamates for their biological
functions. The enzymes involved in the vitamin K‐dependent carboxylation include: gamma …

Key pathways and regulators of vitamin K function and intermediary metabolism

MJ Shearer, T Okano - Annual review of nutrition, 2018 - annualreviews.org
Vitamin K (VK) is an essential cofactor for the post-translational conversion of peptide-bound
glutamate to γ-carboxyglutamate. The resultant vitamin K–dependent proteins are known or …

Vitamin K-dependent protein activation: normal gamma-glutamyl carboxylation and disruption in disease

KL Berkner, KW Runge - International Journal of Molecular Sciences, 2022 - mdpi.com
Vitamin K-dependent (VKD) proteins undergo an unusual post-translational modification,
which is the conversion of specific Glu residues to carboxylated Glu (Gla). Gla generation is …

Human vitamin K 2, 3-epoxide reductase complex subunit 1-like 1 (VKORC1L1) mediates vitamin K-dependent intracellular antioxidant function

P Westhofen, M Watzka, M Marinova, M Hass… - Journal of Biological …, 2011 - ASBMB
Human vitamin K 2, 3-epoxide reductase complex subunit 1-like 1 (VKORC1L1), expressed
in HEK 293T cells and localized exclusively to membranes of the endoplasmic reticulum …

GGCX and VKORC1 inhibit osteocalcin endocrine functions

M Ferron, J Lacombe, A Germain, F Oury… - Journal of Cell …, 2015 - rupress.org
Osteocalcin (OCN) is an osteoblast-derived hormone favoring glucose homeostasis, energy
expenditure, male fertility, brain development, and cognition. Before being secreted by …

Novel insight into the mechanism of the vitamin K oxidoreductase (VKOR): electron relay through Cys43 and Cys51 reduces VKOR to allow vitamin K reduction and …

MA Rishavy, A Usubalieva, KW Hallgren… - Journal of Biological …, 2011 - ASBMB
The vitamin K oxidoreductase (VKOR) reduces vitamin K to support the carboxylation and
consequent activation of vitamin K-dependent proteins, but the mechanism of reduction is …

VKORC1L1, an enzyme rescuing the vitamin K 2, 3-epoxide reductase activity in some extrahepatic tissues during anticoagulation therapy

A Hammed, B Matagrin, G Spohn, C Prouillac… - Journal of Biological …, 2013 - ASBMB
Background: Effective involvement of VKORC1L1 in vitamin K epoxide reductase activity,
target of vitamin K antagonists (VKAs), is still unclear. Results: VKORC1L1 is not inhibited by …