Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5015
Number of amino acids:319
Molecular Weight:34765.44 Da
Theoretical pI:4.95


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)3210.03%
Cysteine CYS (C)82.51%
Glutamic Acid GLU (E)144.39%
Aspartic Acid ASP (D)278.46%
Glycine GLY (G)257.84%
Phynylalanine PHE (F)206.27%
Isoleucine ILE (I)247.52%
Histidine HIS (H)51.57%
Lysine LYS (K)165.02%
Methionine MET (M)41.25%
Leucine LEU (L)268.15%
Asparagine ASN (N)165.02%
Glutamine GLN (Q)165.02%
Proline PRO (P)113.45%
Serine SER (S)195.96%
Arginine ARG (R)144.39%
Threonine THR (T)123.76%
Tryptophan TRP (W)10.31%
Valine VAL (V)237.21%
Tyrosine TYR (Y)61.88%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1542
HydrogenH2422
NitrogenN420
OxygenO471
SulphurS12

FormulaC1542H2422N420O471S12
Total Number of Atoms:4867


Total number of positively charged residues (ARG + LYS):30
Total number of negatively charged residues (ASP + GLU):41
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    14940
Absorption 0.1% (=1 g/l)    0.430,   assuming all pairs of CYS residues form cystines

Ext. coefficient    14440
Absorption 0.1% (=1 g/l)    0.415,   assuming all CYS residues are reduced
Aromaticity:0.085

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.78

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.35, 22.26, 23.82]

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:92.0689
Grand average of hydropathicity (GRAVY):-0.04