RPB4/YJL140W 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] 14 6.3%
Arg[R] 13 5.9%
Asn[N] 14 6.3%
Asp[D] 19 8.6%
Cys[C] 1 0.5%
Gln[Q] 12 5.4%
Glu[E] 29 13.1%
Gly[G] 7 3.2%
His[H] 6 2.7%
Ile[I] 8 3.6%
Leu[L] 28 12.7%
Lys[K] 18 8.1%
Met[M] 3 1.4%
Phe[F] 7 3.2%
Pro[P] 2 0.9%
Ser[S] 12 5.4%
Thr[T] 16 7.2%
Trp[W] 0 0.0%
Tyr[Y] 2 0.9%
Val[V] 10 4.5%
Total Length 221

Instability index
Instability index (II) 48.88
This classifies the protein as unstable

Atomic composition
Carbon 1090
Hydrogen 1770
Nitrogen 316
Oxygen 374
Sulfur 4
Total number of atoms 3554
Formula = C1090H1770N316O374S4

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 2980 M-1 cm-1
assuming NO Cys residues appear as half cystines 2980 M-1 cm-1
assuming all Cys residues are reduced 2980 M-1 cm-1
assuming all pairs of Cys residues form cystines 2980 M-1 cm-1

Aliphatic index
Aliphatic index 82.99

Coding Region Translation Calculations
Codon Bias 0.032
Codon Adaptation Index 0.137
Frequency of Optimal Codons 0.427
Hydropathicity of Protein -0.900
Aromaticity Score 0.041