Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5601
Number of amino acids:318
Molecular Weight:34928.35 Da
Theoretical pI:9.12


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)195.97%
Cysteine CYS (C)20.63%
Glutamic Acid GLU (E)185.66%
Aspartic Acid ASP (D)123.77%
Glycine GLY (G)268.18%
Phynylalanine PHE (F)134.09%
Isoleucine ILE (I)309.43%
Histidine HIS (H)20.63%
Lysine LYS (K)226.92%
Methionine MET (M)41.26%
Leucine LEU (L)257.86%
Asparagine ASN (N)175.35%
Glutamine GLN (Q)165.03%
Proline PRO (P)247.55%
Serine SER (S)216.6%
Arginine ARG (R)144.4%
Threonine THR (T)144.4%
Tryptophan TRP (W)10.31%
Valine VAL (V)278.49%
Tyrosine TYR (Y)113.46%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1580
HydrogenH2528
NitrogenN420
OxygenO458
SulphurS6

FormulaC1580H2528N420O458S6
Total Number of Atoms:4992


Total number of positively charged residues (ARG + LYS):36
Total number of negatively charged residues (ASP + GLU):30
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    22015
Absorption 0.1% (=1 g/l)    0.630,   assuming all pairs of CYS residues form cystines

Ext. coefficient    21890
Absorption 0.1% (=1 g/l)    0.627,   assuming all CYS residues are reduced
Aromaticity:0.079

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.69

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[33.65, 27.67, 20.75]

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:98.0503
Grand average of hydropathicity (GRAVY):-0.12