Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5001
Number of amino acids:311
Molecular Weight:34984.71 Da
Theoretical pI:6.67


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)258.04%
Cysteine CYS (C)41.29%
Glutamic Acid GLU (E)134.18%
Aspartic Acid ASP (D)237.4%
Glycine GLY (G)258.04%
Phynylalanine PHE (F)165.14%
Isoleucine ILE (I)206.43%
Histidine HIS (H)61.93%
Lysine LYS (K)185.79%
Methionine MET (M)82.57%
Leucine LEU (L)247.72%
Asparagine ASN (N)206.43%
Glutamine GLN (Q)92.89%
Proline PRO (P)113.54%
Serine SER (S)196.11%
Arginine ARG (R)175.47%
Threonine THR (T)134.18%
Tryptophan TRP (W)61.93%
Valine VAL (V)206.43%
Tyrosine TYR (Y)144.5%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1569
HydrogenH2411
NitrogenN427
OxygenO459
SulphurS12

FormulaC1569H2411N427O459S12
Total Number of Atoms:4878


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):36
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    54110
Absorption 0.1% (=1 g/l)    1.547,   assuming all pairs of CYS residues form cystines

Ext. coefficient    53860
Absorption 0.1% (=1 g/l)    1.540,   assuming all CYS residues are reduced
Aromaticity:0.116

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 38.91

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[32.15, 24.12, 22.51]

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:81.865
Grand average of hydropathicity (GRAVY):-0.28