Spermidine Biosynthesis I

Proteins (6)

Protein	Synonyms	Taxonomy
S-adenosylmethionine decarboxylase proenzyme	AdoMetDC; SAMDC; EC 4.1.1.50	Escherichia coli K-12
Polyamine aminopropyltransferase	Cadaverine aminopropyltransferase; 2.5.1.-; Putrescine aminopropyltransferase; PAPT; Spermidine aminopropyltransferase; 2.5.1.79; Spermidine synthase; SPDS; SPDSY; 2.5.1.16; Spermine synthase; 2.5.1.22; Thermospermine synthase	Escherichia coli K-12
Spermidine/putrescine transport system permease protein PotB		Escherichia coli K-12
Spermidine/putrescine transport system permease protein PotC		Escherichia coli K-12
Spermidine/putrescine-binding periplasmic protein	SPBP	Escherichia coli K-12
Spermidine/putrescine import ATP-binding protein PotA	EC 7.6.2.11	Escherichia coli K-12

Compound	Description
hydronium ion
Orthophosphate
Carbon Dioxide	A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
Adenosine Triphosphate	An adenine nucleotide containing three phosphate groups esterified to the sugar moiety. In addition to its crucial roles in metabolism adenosine triphosphate is a neurotransmitter.
adenosine diphosphate	Adenosine 5'-(trihydrogen diphosphate). An adenine nucleotide containing two phosphate groups esterified to the sugar moiety at the 5'-position.
Water	A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
spermidine	A polyamine formed from putrescine. It is found in almost all tissues in association with nucleic acids. It is found as a cation at all pH values, and is thought to help stabilize some membranes and nucleic acid structures. It is a precursor of spermine.
5'-methylthioadenosine	structure
putrescine	A toxic diamine formed by putrefaction from the decarboxylation of arginine and ornithine.
s-adenosylmethionine	Physiologic methyl radical donor involved in enzymatic transmethylation reactions and present in all living organisms. It possesses anti-inflammatory activity and has been used in treatment of chronic liver disease. (From Merck, 11th ed)