Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5198
Number of amino acids:321
Molecular Weight:34232.86 Da
Theoretical pI:8.61


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3410.59%
Cysteine CYS (C)92.8%
Glutamic Acid GLU (E)72.18%
Aspartic Acid ASP (D)164.98%
Glycine GLY (G)216.54%
Phynylalanine PHE (F)123.74%
Isoleucine ILE (I)144.36%
Histidine HIS (H)30.93%
Lysine LYS (K)41.25%
Methionine MET (M)82.49%
Leucine LEU (L)319.66%
Asparagine ASN (N)226.85%
Glutamine GLN (Q)72.18%
Proline PRO (P)134.05%
Serine SER (S)3611.22%
Arginine ARG (R)237.17%
Threonine THR (T)268.1%
Tryptophan TRP (W)10.31%
Valine VAL (V)268.1%
Tyrosine TYR (Y)82.49%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1481
HydrogenH2386
NitrogenN430
OxygenO467
SulphurS17

FormulaC1481H2386N430O467S17
Total Number of Atoms:4781


Total number of positively charged residues (ARG + LYS):27
Total number of negatively charged residues (ASP + GLU):23
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    17920
Absorption 0.1% (=1 g/l)    0.523,   assuming all pairs of CYS residues form cystines

Ext. coefficient    17420
Absorption 0.1% (=1 g/l)    0.509,   assuming all CYS residues are reduced
Aromaticity:0.065

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 39.31

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.66, 28.66, 24.92]

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:88.7539
Grand average of hydropathicity (GRAVY):0.08