Physicochemical Properties of Peptide



PPepDB ID:PPepDB_2466
Number of amino acids:44
Molecular Weight:4830.27 Da
Theoretical pI:4.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)24.55%
Cysteine CYS (C)818.18%
Glutamic Acid GLU (E)12.27%
Aspartic Acid ASP (D)49.09%
Glycine GLY (G)715.91%
Phynylalanine PHE (F)24.55%
Isoleucine ILE (I)00%
Histidine HIS (H)12.27%
Lysine LYS (K)00%
Methionine MET (M)00%
Leucine LEU (L)24.55%
Asparagine ASN (N)12.27%
Glutamine GLN (Q)49.09%
Proline PRO (P)12.27%
Serine SER (S)36.82%
Arginine ARG (R)24.55%
Threonine THR (T)24.55%
Tryptophan TRP (W)24.55%
Valine VAL (V)00%
Tyrosine TYR (Y)24.55%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC199
HydrogenH283
NitrogenN59
OxygenO67
SulphurS8

FormulaC199H283N59O67S8
Total Number of Atoms:616


Total number of positively charged residues (ARG + LYS):2
Total number of negatively charged residues (ASP + GLU):5
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14480
Absorption 0.1% (=1 g/l)    2.998,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13980
Absorption 0.1% (=1 g/l)    2.894,   assuming all CYS residues are reduced
Aromaticity:0.136

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 23.52

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[18.18, 27.27, 11.36]

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:22.2727
Grand average of hydropathicity (GRAVY):-0.52