Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5560
Number of amino acids:98
Molecular Weight:11096.87 Da
Theoretical pI:9.23


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)22.04%
Cysteine CYS (C)99.18%
Glutamic Acid GLU (E)44.08%
Aspartic Acid ASP (D)22.04%
Glycine GLY (G)88.16%
Phynylalanine PHE (F)66.12%
Isoleucine ILE (I)55.1%
Histidine HIS (H)11.02%
Lysine LYS (K)77.14%
Methionine MET (M)11.02%
Leucine LEU (L)77.14%
Asparagine ASN (N)88.16%
Glutamine GLN (Q)11.02%
Proline PRO (P)77.14%
Serine SER (S)88.16%
Arginine ARG (R)77.14%
Threonine THR (T)66.12%
Tryptophan TRP (W)33.06%
Valine VAL (V)44.08%
Tyrosine TYR (Y)22.04%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC489
HydrogenH760
NitrogenN140
OxygenO136
SulphurS10

FormulaC489H760N140O136S10
Total Number of Atoms:1535


Total number of positively charged residues (ARG + LYS):14
Total number of negatively charged residues (ASP + GLU):6
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    19980
Absorption 0.1% (=1 g/l)    1.801,   assuming all pairs of CYS residues form cystines

Ext. coefficient    19480
Absorption 0.1% (=1 g/l)    1.755,   assuming all CYS residues are reduced
Aromaticity:0.112

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 32.27

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[27.55, 31.63, 14.29]

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:61.6327
Grand average of hydropathicity (GRAVY):-0.35