GCN4/YEL009C Additional Physico-chemical Properties Help

Physico-chemical properties were determined using the ProtParam tool available through ExPASy to analyze the primary protein sequence for atomic composition, extinction coefficient, estimated half-life, instability index and aliphatic index. Transcript translation calculations were determined using CodonW.


A.A. Composition
Ala[A] 19 6.8%
Arg[R] 13 4.6%
Asn[N] 13 4.6%
Asp[D] 22 7.8%
Cys[C] 0 0.0%
Gln[Q] 8 2.8%
Glu[E] 24 8.5%
Gly[G] 6 2.1%
His[H] 4 1.4%
Ile[I] 9 3.2%
Leu[L] 27 9.6%
Lys[K] 23 8.2%
Met[M] 5 1.8%
Phe[F] 11 3.9%
Pro[P] 20 7.1%
Ser[S] 31 11.0%
Thr[T] 20 7.1%
Trp[W] 1 0.4%
Tyr[Y] 4 1.4%
Val[V] 21 7.5%
Total Length 281

Instability index
Instability index (II) 44.02
This classifies the protein as unstable

Atomic composition
Carbon 1374
Hydrogen 2205
Nitrogen 373
Oxygen 450
Sulfur 5
Total number of atoms 4407
Formula = C1374H2205N373O450S5

Estimated half-life
Escherichia coli (in vivo) >10 hours
mammalian reticulocytes (in vitro) 30 hours
yeast (in vivo) >20 hours

Extinction Coefficients at 280 nm
assuming ALL Cys residues appear as half cystines 11460 M-1 cm-1

Aliphatic index
Aliphatic index 78.40

Coding Region Translation Calculations
Codon Bias 0.246
Codon Adaptation Index 0.233
Frequency of Optimal Codons 0.545
Hydropathicity of Protein -0.601
Aromaticity Score 0.057