Physicochemical Properties of Peptide



PPepDB ID:PPepDB_1490
Number of amino acids:35
Molecular Weight:4066.51 Da
Theoretical pI:5.3


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)00%
Cysteine CYS (C)617.14%
Glutamic Acid GLU (E)25.71%
Aspartic Acid ASP (D)25.71%
Glycine GLY (G)12.86%
Phynylalanine PHE (F)12.86%
Isoleucine ILE (I)25.71%
Histidine HIS (H)25.71%
Lysine LYS (K)25.71%
Methionine MET (M)00%
Leucine LEU (L)12.86%
Asparagine ASN (N)514.29%
Glutamine GLN (Q)00%
Proline PRO (P)12.86%
Serine SER (S)38.57%
Arginine ARG (R)00%
Threonine THR (T)38.57%
Tryptophan TRP (W)25.71%
Valine VAL (V)12.86%
Tyrosine TYR (Y)12.86%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC171
HydrogenH250
NitrogenN48
OxygenO56
SulphurS6

FormulaC171H250N48O56S6
Total Number of Atoms:531


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):4
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    12865
Absorption 0.1% (=1 g/l)    3.164,   assuming all pairs of CYS residues form cystines

Ext. coefficient    12490
Absorption 0.1% (=1 g/l)    3.071,   assuming all CYS residues are reduced
Aromaticity:0.114

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 29.72

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.86, 28.57, 8.57]

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:41.7143
Grand average of hydropathicity (GRAVY):-0.59