API2/YDR525W 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] 6 5.5%
Arg[R] 11 10.1%
Asn[N] 3 2.8%
Asp[D] 0 0.0%
Cys[C] 1 0.9%
Gln[Q] 4 3.7%
Glu[E] 2 1.8%
Gly[G] 8 7.3%
His[H] 4 3.7%
Ile[I] 3 2.8%
Leu[L] 7 6.4%
Lys[K] 14 12.8%
Met[M] 4 3.7%
Phe[F] 7 6.4%
Pro[P] 4 3.7%
Ser[S] 15 13.8%
Thr[T] 7 6.4%
Trp[W] 2 1.8%
Tyr[Y] 3 2.8%
Val[V] 4 3.7%
Total Length 109

Instability index
Instability index (II) 51.65
This classifies the protein as unstable

Atomic composition
Carbon 558
Hydrogen 897
Nitrogen 173
Oxygen 146
Sulfur 5
Total number of atoms 1779
Formula = C558H897N173O146S5

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 15470 M-1 cm-1
assuming NO Cys residues appear as half cystines 15470 M-1 cm-1
assuming all Cys residues are reduced 15470 M-1 cm-1
assuming all pairs of Cys residues form cystines 15470 M-1 cm-1

Aliphatic index
Aliphatic index 51.93

Coding Region Translation Calculations
Codon Bias -0.062
Codon Adaptation Index 0.082
Frequency of Optimal Codons 0.340
Hydropathicity of Protein -0.763
Aromaticity Score 0.110