SRB4/YER022W 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] 21 3.1%
Arg[R] 27 3.9%
Asn[N] 50 7.3%
Asp[D] 55 8.0%
Cys[C] 2 0.3%
Gln[Q] 20 2.9%
Glu[E] 63 9.2%
Gly[G] 24 3.5%
His[H] 15 2.2%
Ile[I] 59 8.6%
Leu[L] 77 11.2%
Lys[K] 65 9.5%
Met[M] 14 2.0%
Phe[F] 24 3.5%
Pro[P] 26 3.8%
Ser[S] 66 9.6%
Thr[T] 28 4.1%
Trp[W] 2 0.3%
Tyr[Y] 15 2.2%
Val[V] 34 4.9%
Total Length 687

Instability index
Instability index (II) 50.44
This classifies the protein as unstable

Atomic composition
Carbon 3463
Hydrogen 5581
Nitrogen 935
Oxygen 1103
Sulfur 16
Total number of atoms 11098
Formula = C3463H5581N935O1103S16

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 33475 M-1 cm-1
assuming NO Cys residues appear as half cystines 33350 M-1 cm-1
assuming all Cys residues are reduced 33350 M-1 cm-1
assuming all pairs of Cys residues form cystines 33475 M-1 cm-1

Aliphatic index
Aliphatic index 94.61

Coding Region Translation Calculations
Codon Bias 0.031
Codon Adaptation Index 0.151
Frequency of Optimal Codons 0.438
Hydropathicity of Protein -0.565
Aromaticity Score 0.060