permease

per·me·ase

P0201000 (pûr′mē-ās′)n. Any of several cell-membrane proteins that function as channels for the passive transport of a specific molecule in or out of the cell.

[perme(ate) + -ase.]

permease

(ˈpɜːmɪeɪz) n (Biochemistry) biochem a carrier protein that facilitates the transport of a given molecule through a cell membrane

per•me•ase

(ˈpɜr miˌeɪs, -ˌeɪz)

n. any protein of the cell membrane that functions as a channel for specific molecular substances to enter or leave the cell. [< French perméase (1956)]

Permease

enUK

permease

[′pər·mē‚ās] (biochemistry) Any of a group of enzymes which mediate the phenomenon of active transport.

Permease

a component, probably of a protein nature, of certain biological membranes that transports metabolites across the membrane. Each permease transports a specific group of chemically similar compounds, and its biosynthesis is controlled by a single gene. The most extensively studied permeases have been those that transport carbohydrates in bacteria, although permeases for amino acids and several ions are also known. The bacterium Escherichia coli has from 30 to 60 different permeases.

The term “permease” is often extended to imply a functional meaning, that is, to designate an entire multicomponent system for the transport of a certain compound. This usage is erroneous, since permeases cannot be equated with enzymes, which are also named by adding the suffix “-ase.” It has been proposed that permeases be called transport proteins, or transfors.

REFERENCES

De Robertis, E., W. Nowinski, and F. Saez. Biologiia kletki. Moscow, 1973. (Translated from English.)
Cohen, G. N., and J. Monod. “Bacterial Permeases.” Bacteriological Reviews, 1957, vol. 21, no. 3, p. 169.

V. K. ANTONOV

permease

per·me·ase

(per'mē-ās), Any of a group of membrane-bound carriers (enzymes) that effect the transport of solute through a semipermeable membrane; this term is not typically used to describe eukaryotes.

permease

(pûr′mē-ās′)n. Any of several cell-membrane proteins that function as channels for the passive transport of a specific molecule in or out of the cell.

per·me·ase

(pĕr'mē-ās) Any of a group of membrane-bound carriers (enzymes) that cause transport of solute through a semipermeable membrane.

permease

a protein thought to act as a carrier in ACTIVE TRANSPORT within membranes.

单词	permease
释义	permease enUK per·me·ase P0201000 (pûr′mē-ās′)n. Any of several cell-membrane proteins that function as channels for the passive transport of a specific molecule in or out of the cell. [perme(ate) + -ase.] permease (ˈpɜːmɪeɪz) n (Biochemistry) biochem a carrier protein that facilitates the transport of a given molecule through a cell membrane per•me•ase (ˈpɜr miˌeɪs, -ˌeɪz) n. any protein of the cell membrane that functions as a channel for specific molecular substances to enter or leave the cell. [< French perméase (1956)] Permease enUK permease [′pər·mē‚ās] (biochemistry) Any of a group of enzymes which mediate the phenomenon of active transport. Permease a component, probably of a protein nature, of certain biological membranes that transports metabolites across the membrane. Each permease transports a specific group of chemically similar compounds, and its biosynthesis is controlled by a single gene. The most extensively studied permeases have been those that transport carbohydrates in bacteria, although permeases for amino acids and several ions are also known. The bacterium Escherichia coli has from 30 to 60 different permeases. The term “permease” is often extended to imply a functional meaning, that is, to designate an entire multicomponent system for the transport of a certain compound. This usage is erroneous, since permeases cannot be equated with enzymes, which are also named by adding the suffix “-ase.” It has been proposed that permeases be called transport proteins, or transfors. REFERENCES De Robertis, E., W. Nowinski, and F. Saez. Biologiia kletki. Moscow, 1973. (Translated from English.) Cohen, G. N., and J. Monod. “Bacterial Permeases.” Bacteriological Reviews, 1957, vol. 21, no. 3, p. 169. V. K. ANTONOV permease enUK per·me·ase (per'mē-ās), Any of a group of membrane-bound carriers (enzymes) that effect the transport of solute through a semipermeable membrane; this term is not typically used to describe eukaryotes. permease (pûr′mē-ās′)n. Any of several cell-membrane proteins that function as channels for the passive transport of a specific molecule in or out of the cell. per·me·ase (pĕr'mē-ās) Any of a group of membrane-bound carriers (enzymes) that cause transport of solute through a semipermeable membrane. permease a protein thought to act as a carrier in ACTIVE TRANSPORT within membranes.
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