Characterization of c-tocopherol methyltransferases from Capsicum annuum L and Arabidopsis thaliana (Record no. 43462)

MARC details
000 -LEADER
fixed length control field 02030nam a2200265Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field MX-MdCICY
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250625124734.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-9207
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 250602s9999 xx |||||s2 |||| ||und|d
245 10 - TITLE STATEMENT
Title Characterization of c-tocopherol methyltransferases from Capsicum annuum L and Arabidopsis thaliana
490 0# - SERIES STATEMENT
Volume/sequential designation Eur. J. Biochem., 270(1), p.84-92, 2003
520 3# - SUMMARY, ETC.
Summary, etc. Tocopherols are essential micronutrients in human and animal nutrition due to their function as lipophilic antioxidants. They are exclusively synthesized by photosynthetic organisms including higher plants. Despite the attributed beneficial health effects and many industrial applications, research on the tocopherol biosynthetic pathway and its regulation in plants is still limited. In the work presented here we performed a detailed biochemical characterization of a c-tocopherol methyltransferase (c-TMT)from Arabidopsis thaliana and of a c-TMT purified from Capsicum annuum fruits,a tissue with high accumulation of tocopherols. The biochemical characteristics of both enzyme preparations were remarkably similar including substrate specificities. Both enzymes converted d- and c- into b- and a-tocopherol, respectively,b ut b-tocopherol was not accepted as a substrate, pointing to a specificmethylation at the C(5)-position of the tocopherol aromatic head group. A kinetic analysis performed with the Arabidopsis enzyme was consistent with an iso-ordered bi-bi type reaction mechanism. Our results emphasize the role of c-TMT in regulating the spectrum of accumulated tocopherols in plants
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element ARABIDOPSIS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element CAPSICUM
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element C-TOCOPHEROL
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element METHYLTRANSFERASE
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element VITAMIN E
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Koch, M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Lemke, R.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Heise, K.P.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Mock, H.P.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1mwV0wTL_Ivygovb761GWVlkJcrTzgrjp/view?usp=drivesdk">https://drive.google.com/file/d/1mwV0wTL_Ivygovb761GWVlkJcrTzgrjp/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
942 ## - ADDED ENTRY ELEMENTS (KOHA)
Source of classification or shelving scheme Clasificación local
Koha item type Documentos solicitados
Holdings
Lost status Source of classification or shelving scheme Damaged status Not for loan Collection Home library Current library Shelving location Date acquired Total checkouts Full call number Date last seen Price effective from Koha item type
  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-9207 25.06.2025 25.06.2025 Documentos solicitados