SKN1/YGR143W 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] 46 6.0%
Arg[R] 30 3.9%
Asn[N] 67 8.7%
Asp[D] 54 7.0%
Cys[C] 6 0.8%
Gln[Q] 27 3.5%
Glu[E] 39 5.1%
Gly[G] 52 6.7%
His[H] 17 2.2%
Ile[I] 35 4.5%
Leu[L] 53 6.9%
Lys[K] 22 2.9%
Met[M] 15 1.9%
Phe[F] 36 4.7%
Pro[P] 43 5.6%
Ser[S] 93 12.1%
Thr[T] 48 6.2%
Trp[W] 14 1.8%
Tyr[Y] 45 5.8%
Val[V] 29 3.8%
Total Length 771

Instability index
Instability index (II) 54.75
This classifies the protein as unstable

Atomic composition
Carbon 3805
Hydrogen 5657
Nitrogen 1025
Oxygen 1238
Sulfur 21
Total number of atoms 11746
Formula = C3805H5657N1025O1238S21

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 144425 M-1 cm-1
assuming NO Cys residues appear as half cystines 144050 M-1 cm-1
assuming all Cys residues are reduced 144050 M-1 cm-1
assuming all pairs of Cys residues form cystines 144425 M-1 cm-1

Aliphatic index
Aliphatic index 61.39

Coding Region Translation Calculations
Codon Bias 0.076
Codon Adaptation Index 0.137
Frequency of Optimal Codons 0.447
Hydropathicity of Protein -0.636
Aromaticity Score 0.123