Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4754
Number of amino acids:314
Molecular Weight:33854.89 Da
Theoretical pI:8.52


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)247.64%
Cysteine CYS (C)41.27%
Glutamic Acid GLU (E)175.41%
Aspartic Acid ASP (D)103.18%
Glycine GLY (G)278.6%
Phynylalanine PHE (F)165.1%
Isoleucine ILE (I)278.6%
Histidine HIS (H)20.64%
Lysine LYS (K)257.96%
Methionine MET (M)10.32%
Leucine LEU (L)268.28%
Asparagine ASN (N)216.69%
Glutamine GLN (Q)196.05%
Proline PRO (P)175.41%
Serine SER (S)206.37%
Arginine ARG (R)51.59%
Threonine THR (T)185.73%
Tryptophan TRP (W)00%
Valine VAL (V)268.28%
Tyrosine TYR (Y)92.87%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1529
HydrogenH2440
NitrogenN398
OxygenO456
SulphurS5

FormulaC1529H2440N398O456S5
Total Number of Atoms:4828


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):27
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    13660
Absorption 0.1% (=1 g/l)    0.403,   assuming all pairs of CYS residues form cystines

Ext. coefficient    13410
Absorption 0.1% (=1 g/l)    0.396,   assuming all CYS residues are reduced
Aromaticity:0.080

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 37.98

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.12, 27.07, 21.66]

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:97.4841
Grand average of hydropathicity (GRAVY):-0.03