HER2/YMR293C 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] 20 4.3%
Arg[R] 19 4.1%
Asn[N] 23 5.0%
Asp[D] 26 5.6%
Cys[C] 6 1.3%
Gln[Q] 5 1.1%
Glu[E] 24 5.2%
Gly[G] 37 8.0%
His[H] 7 1.5%
Ile[I] 34 7.3%
Leu[L] 50 10.8%
Lys[K] 37 8.0%
Met[M] 7 1.5%
Phe[F] 22 4.7%
Pro[P] 27 5.8%
Ser[S] 49 10.6%
Thr[T] 23 5.0%
Trp[W] 0 0.0%
Tyr[Y] 17 3.7%
Val[V] 31 6.7%
Total Length 464

Instability index
Instability index (II) 41.69
This classifies the protein as unstable

Atomic composition
Carbon 2290
Hydrogen 3652
Nitrogen 600
Oxygen 682
Sulfur 13
Total number of atoms 7237
Formula = C2290H3652N600O682S13

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 25705 M-1 cm-1
assuming NO Cys residues appear as half cystines 25330 M-1 cm-1
assuming all Cys residues are reduced 25330 M-1 cm-1
assuming all pairs of Cys residues form cystines 25705 M-1 cm-1

Aliphatic index
Aliphatic index 94.29

Coding Region Translation Calculations
Codon Bias -0.018
Codon Adaptation Index 0.107
Frequency of Optimal Codons 0.387
Hydropathicity of Protein -0.133
Aromaticity Score 0.084