ENA2/YDR039C 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] 80 7.3%
Arg[R] 41 3.8%
Asn[N] 61 5.6%
Asp[D] 70 6.4%
Cys[C] 16 1.5%
Gln[Q] 28 2.6%
Glu[E] 61 5.6%
Gly[G] 73 6.7%
His[H] 20 1.8%
Ile[I] 82 7.5%
Leu[L] 89 8.2%
Lys[K] 63 5.8%
Met[M] 29 2.7%
Phe[F] 52 4.8%
Pro[P] 38 3.5%
Ser[S] 90 8.2%
Thr[T] 70 6.4%
Trp[W] 16 1.5%
Tyr[Y] 25 2.3%
Val[V] 87 8.0%
Total Length 1091

Instability index
Instability index (II) 35.67
This classifies the protein as stable

Atomic composition
Carbon 5362
Hydrogen 8440
Nitrogen 1422
Oxygen 1628
Sulfur 45
Total number of atoms 16897
Formula = C5362H8440N1422O1628S45

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 126250 M-1 cm-1
assuming NO Cys residues appear as half cystines 125250 M-1 cm-1
assuming all Cys residues are reduced 125250 M-1 cm-1
assuming all pairs of Cys residues form cystines 126250 M-1 cm-1

Aliphatic index
Aliphatic index 91.59

Coding Region Translation Calculations
Codon Bias 0.189
Codon Adaptation Index 0.190
Frequency of Optimal Codons 0.523
Hydropathicity of Protein -0.059
Aromaticity Score 0.085