Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5939
Number of amino acids:89
Molecular Weight:9038.51 Da
Theoretical pI:8.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)1516.85%
Cysteine CYS (C)66.74%
Glutamic Acid GLU (E)11.12%
Aspartic Acid ASP (D)44.49%
Glycine GLY (G)1011.24%
Phynylalanine PHE (F)22.25%
Isoleucine ILE (I)22.25%
Histidine HIS (H)11.12%
Lysine LYS (K)44.49%
Methionine MET (M)88.99%
Leucine LEU (L)22.25%
Asparagine ASN (N)33.37%
Glutamine GLN (Q)33.37%
Proline PRO (P)55.62%
Serine SER (S)66.74%
Arginine ARG (R)33.37%
Threonine THR (T)55.62%
Tryptophan TRP (W)00%
Valine VAL (V)77.87%
Tyrosine TYR (Y)22.25%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC377
HydrogenH612
NitrogenN110
OxygenO119
SulphurS14

FormulaC377H612N110O119S14
Total Number of Atoms:1232


Total number of positively charged residues (ARG + LYS):7
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3355
Absorption 0.1% (=1 g/l)    0.371,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.330,   assuming all CYS residues are reduced
Aromaticity:0.045

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 14.44

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[16.85, 26.97, 29.21]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:57.191
Grand average of hydropathicity (GRAVY):0.17