SAK1/YER129W 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] 45 3.9%
Arg[R] 66 5.8%
Asn[N] 79 6.9%
Asp[D] 74 6.5%
Cys[C] 15 1.3%
Gln[Q] 35 3.1%
Glu[E] 70 6.1%
Gly[G] 56 4.9%
His[H] 29 2.5%
Ile[I] 57 5.0%
Leu[L] 102 8.9%
Lys[K] 93 8.1%
Met[M] 20 1.8%
Phe[F] 39 3.4%
Pro[P] 58 5.1%
Ser[S] 166 14.5%
Thr[T] 59 5.2%
Trp[W] 3 0.3%
Tyr[Y] 18 1.6%
Val[V] 58 5.1%
Total Length 1142

Instability index
Instability index (II) 52.63
This classifies the protein as unstable

Atomic composition
Carbon 5471
Hydrogen 8838
Nitrogen 1608
Oxygen 1788
Sulfur 35
Total number of atoms 17740
Formula = C5471H8838N1608O1788S35

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 44195 M-1 cm-1
assuming NO Cys residues appear as half cystines 43320 M-1 cm-1
assuming all Cys residues are reduced 43320 M-1 cm-1
assuming all pairs of Cys residues form cystines 44195 M-1 cm-1

Aliphatic index
Aliphatic index 72.97

Coding Region Translation Calculations
Codon Bias -0.020
Codon Adaptation Index 0.115
Frequency of Optimal Codons 0.386
Hydropathicity of Protein -0.716
Aromaticity Score 0.053