Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5133
Number of amino acids:87
Molecular Weight:9627.2 Da
Theoretical pI:5.16


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)910.34%
Cysteine CYS (C)55.75%
Glutamic Acid GLU (E)55.75%
Aspartic Acid ASP (D)89.2%
Glycine GLY (G)22.3%
Phynylalanine PHE (F)00%
Isoleucine ILE (I)66.9%
Histidine HIS (H)33.45%
Lysine LYS (K)66.9%
Methionine MET (M)66.9%
Leucine LEU (L)910.34%
Asparagine ASN (N)33.45%
Glutamine GLN (Q)11.15%
Proline PRO (P)44.6%
Serine SER (S)44.6%
Arginine ARG (R)33.45%
Threonine THR (T)89.2%
Tryptophan TRP (W)00%
Valine VAL (V)33.45%
Tyrosine TYR (Y)22.3%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC409
HydrogenH676
NitrogenN112
OxygenO132
SulphurS11

FormulaC409H676N112O132S11
Total Number of Atoms:1340


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):13
Extinction Coefficient:This protein does not contain any Tryptophan residues. Experience shows that this could result in more than 10% error in the computed extinction coefficient.

Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    3230
Absorption 0.1% (=1 g/l)    0.336,   assuming all pairs of CYS residues form cystines

Ext. coefficient    2980
Absorption 0.1% (=1 g/l)    0.310,   assuming all CYS residues are reduced
Aromaticity:0.023

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 31.81

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[22.99, 14.94, 33.33]

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:87.5861
Grand average of hydropathicity (GRAVY):-0.12