STE18/YJR086W 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] 4 3.6%
Arg[R] 5 4.5%
Asn[N] 12 10.9%
Asp[D] 1 0.9%
Cys[C] 3 2.7%
Gln[Q] 14 12.7%
Glu[E] 6 5.5%
Gly[G] 3 2.7%
His[H] 1 0.9%
Ile[I] 6 5.5%
Leu[L] 13 11.8%
Lys[K] 9 8.2%
Met[M] 3 2.7%
Phe[F] 1 0.9%
Pro[P] 4 3.6%
Ser[S] 11 10.0%
Thr[T] 7 6.4%
Trp[W] 1 0.9%
Tyr[Y] 3 2.7%
Val[V] 3 2.7%
Total Length 110

Instability index
Instability index (II) 61.61
This classifies the protein as unstable

Atomic composition
Carbon 541
Hydrogen 893
Nitrogen 163
Oxygen 172
Sulfur 6
Total number of atoms 1775
Formula = C541H893N163O172S6

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 10095 M-1 cm-1
assuming NO Cys residues appear as half cystines 9970 M-1 cm-1
assuming all Cys residues are reduced 9970 M-1 cm-1
assuming all pairs of Cys residues form cystines 10095 M-1 cm-1

Aliphatic index
Aliphatic index 78.91

Coding Region Translation Calculations
Codon Bias -0.023
Codon Adaptation Index 0.101
Frequency of Optimal Codons 0.396
Hydropathicity of Protein -0.820
Aromaticity Score 0.045