Physicochemical Properties of Peptide



PPepDB ID:PPepDB_4157
Number of amino acids:775
Molecular Weight:84823.57 Da
Theoretical pI:6.73


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)455.81%
Cysteine CYS (C)121.55%
Glutamic Acid GLU (E)425.42%
Aspartic Acid ASP (D)395.03%
Glycine GLY (G)577.35%
Phynylalanine PHE (F)283.61%
Isoleucine ILE (I)425.42%
Histidine HIS (H)263.35%
Lysine LYS (K)374.77%
Methionine MET (M)172.19%
Leucine LEU (L)9712.52%
Asparagine ASN (N)476.06%
Glutamine GLN (Q)232.97%
Proline PRO (P)526.71%
Serine SER (S)8811.35%
Arginine ARG (R)405.16%
Threonine THR (T)263.35%
Tryptophan TRP (W)50.65%
Valine VAL (V)395.03%
Tyrosine TYR (Y)131.68%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC3738
HydrogenH5957
NitrogenN1059
OxygenO1135
SulphurS29

FormulaC3738H5957N1059O1135S29
Total Number of Atoms:11918


Total number of positively charged residues (ARG + LYS):77
Total number of negatively charged residues (ASP + GLU):81
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    47620
Absorption 0.1% (=1 g/l)    0.561,   assuming all pairs of CYS residues form cystines

Ext. coefficient    46870
Absorption 0.1% (=1 g/l)    0.553,   assuming all CYS residues are reduced
Aromaticity:0.059

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 45.05

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[28.90, 31.48, 25.94]

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:90.3483
Grand average of hydropathicity (GRAVY):-0.27