Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4631
Number of amino acids:321
Molecular Weight:33641.7 Da
Theoretical pI:8.29


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3912.15%
Cysteine CYS (C)175.3%
Glutamic Acid GLU (E)51.56%
Aspartic Acid ASP (D)154.67%
Glycine GLY (G)4614.33%
Phynylalanine PHE (F)164.98%
Isoleucine ILE (I)92.8%
Histidine HIS (H)51.56%
Lysine LYS (K)72.18%
Methionine MET (M)61.87%
Leucine LEU (L)134.05%
Asparagine ASN (N)113.43%
Glutamine GLN (Q)134.05%
Proline PRO (P)195.92%
Serine SER (S)216.54%
Arginine ARG (R)175.3%
Threonine THR (T)257.79%
Tryptophan TRP (W)72.18%
Valine VAL (V)175.3%
Tyrosine TYR (Y)134.05%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1471
HydrogenH2216
NitrogenN420
OxygenO445
SulphurS23

FormulaC1471H2216N420O445S23
Total Number of Atoms:4575


Total number of positively charged residues (ARG + LYS):24
Total number of negatively charged residues (ASP + GLU):20
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    58870
Absorption 0.1% (=1 g/l)    1.750,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.720,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.02

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[23.36, 30.22, 19.63]

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:54.2367
Grand average of hydropathicity (GRAVY):-0.15