ISDA: 2B2C

Deposition Date 2005-09-19

Release Date 2005-11-15

Last Version Date 2024-03-13

Entry Detail

PDB ID:

2B2C

Keywords:

TRANSFERASE

Title:

Cloning, expression, characterisation and three- dimensional structure determination of the Caenorhabditis elegans spermidine synthase

Biological Source:

Source Organism:

Caenorhabditis elegans (Taxon ID: 6239)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.50 Å

R-Value Free:

0.25

R-Value Work:

0.21

R-Value Observed:

0.22

Space Group:

P 1 21 1

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:spermidine synthase
Chain IDs:A, B
Chain Length:314
Number of Molecules:2
Biological Source:Caenorhabditis elegans

UniProt ID:G5EFG3 Pfam ID:PF17284, PF01564

Primary Citation

Cloning, expression, characterisation and three-dimensional structure determination of Caenorhabditis elegans spermidine synthase

Dufe, V.T, Luersen, K, Eschbach, M.L, Haider, N, Karlberg, T, Walter, R.D, Al-Karadaghi, S.Show

FEBS LETT. 579 6037 6043 (2005)

PMID: 16226262 DOI: 10.1016/j.febslet.2005.09.050

Abstact

The polyamine synthesis enzyme spermidine synthase (SPDS) has been cloned from the model nematode Caenorhabditis elegans. Biochemical characterisation of the recombinantly expressed protein revealed a high degree of similarity to other eukaryotic SPDS with the exception of a low affinity towards the substrate decarboxylated S-adenosylmethionine (Km = 110 microM) and a less pronounced feedback inhibition by the second reaction product 5'-methylthioadenosine (IC50 = 430 microM). The C. elegans protein that carries a nematode-specific insertion of 27 amino acids close to its N-terminus was crystallized, leading to the first X-ray structure of a dimeric eukaryotic SPDS.

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