Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5389
Number of amino acids:730
Molecular Weight:81210.49 Da
Theoretical pI:6.35


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)253.42%
Cysteine CYS (C)253.42%
Glutamic Acid GLU (E)516.99%
Aspartic Acid ASP (D)375.07%
Glycine GLY (G)577.81%
Phynylalanine PHE (F)283.84%
Isoleucine ILE (I)446.03%
Histidine HIS (H)111.51%
Lysine LYS (K)466.3%
Methionine MET (M)182.47%
Leucine LEU (L)638.63%
Asparagine ASN (N)466.3%
Glutamine GLN (Q)162.19%
Proline PRO (P)334.52%
Serine SER (S)648.77%
Arginine ARG (R)385.21%
Threonine THR (T)496.71%
Tryptophan TRP (W)40.55%
Valine VAL (V)506.85%
Tyrosine TYR (Y)253.42%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3557
HydrogenH5654
NitrogenN978
OxygenO1107
SulphurS43

FormulaC3557H5654N978O1107S43
Total Number of Atoms:11339


Total number of positively charged residues (ARG + LYS):84
Total number of negatively charged residues (ASP + GLU):88
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    60750
Absorption 0.1% (=1 g/l)    0.748,   assuming all pairs of CYS residues form cystines

Ext. coefficient    59250
Absorption 0.1% (=1 g/l)    0.730,   assuming all CYS residues are reduced
Aromaticity:0.078

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 44.80

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.32, 27.40, 21.51]

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:80.4521
Grand average of hydropathicity (GRAVY):-0.33